# The Evidence-Based Life
How to live longer, fall ill less often, and respond effectively in emergencies. How to stop wasting hard-earned money, avoid scams, and stay clear of legal landmines. What statutory benefits to claim when unemployed or broke, and what licenses and procedures are required when starting a business, launching a website, or taking freelance contracts. Empirical guidance on relationships, marriage, raising children, international travel, and career skills.
649 recommendations, each explicitly detailing exact costs incurred, expected returns, and evidence robustness, sourced exclusively from peer-reviewed journals and official statutory documents.
You don't need to do everything: this is a prioritized catalog ranked by return-on-investment (ROI), not an exhaustive to-do list. Adopting even one or two rules delivers tangible value; the author has not implemented most of them either.
[](https://parveen0029.github.io/The-Evidence-Based-Life/)
[](#table-of-contents)
[](#evidence-grading)
[](docs/verification-records/)
[](#license)
### [Open Interactive Online Reader](https://parveen0029.github.io/The-Evidence-Based-Life/) · [Ask AI via Skill](skills/life-decision-guide/README.md)
Our AI assistant skill supports Claude Code, Codex, and compatible agents. Once installed, ask questions like *"Should I co-sign a loan for a friend?"* and it will cross-reference the repository before formulating an evidence-based answer, complete with exact chapter and rule citations.
| Downloads |
[PDF](https://github.com/parveen0029/The-Evidence-Based-Life/releases/download/epub-latest/The-Evidence-Based-Life.pdf) · [EPUB](https://github.com/parveen0029/The-Evidence-Based-Life/releases/download/epub-latest/The-Evidence-Based-Life.epub) · [Offline Single-File HTML](https://github.com/parveen0029/The-Evidence-Based-Life/releases/download/epub-latest/The-Evidence-Based-Life.html)
|
| Navigation |
[Table of Contents](#table-of-contents) · [Glossary](#glossary-understanding-the-numbers) · [Verification Records](docs/verification-records/) · [Cross-Reference Index](docs/citation-cross-reference.md)
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| Essays |
[Is Marriage Financially Worth It?](docs/is-marriage-financially-worth-it.md) · [Home Emergency Kit Checklist](docs/home-emergency-kit-checklist.md) · [Should You Stop for Strangers in an Emergency?](docs/should-you-stop-for-strangers-in-an-emergency.md) · [Platform Compliance and Licensing](docs/platform-compliance-and-licensing.md) · [Circadian Rhythms and Night Shifts](docs/circadian-rhythms-and-night-shifts.md)
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| Attribution |
Original Chinese Edition by [eternity4719](https://github.com/eternity4719/HowToLiveBetter) (*HowToLiveBetter*) · English Edition maintained by [parveen0029](https://github.com/parveen0029/The-Evidence-Based-Life)
|
---
## What This Book Answers
| Core Life Question | Chapter Reference |
| --- | --- |
| What near-zero-cost actions produce the largest reduction in premature mortality risk? | [1. Avoiding Premature Death](book/01-avoiding-premature-death.md) |
| Exactly how much lifespan do smoking, alcohol, sedentary habits, and sleep deprivation destroy; how do you quit, and which cooking oils are backed by evidence? | [2. Preventing Chronic Decline](book/02-preventing-chronic-decline.md) |
| How do you eliminate daily mental exhaustion, constant interruptions, and chronic decision fatigue? | [3. Protecting Your Mental Energy](book/03-protecting-your-mental-energy.md) |
| Where does your time actually vanish, how do you cut zero-ROI activities, and how do you clinically defeat procrastination? | [4. Stopping Time Wasters](book/04-stopping-time-wasters.md) |
| Where should savings be parked to avoid being eroded by hidden management fees, consumer interest, and wealth-stripping scams? | [5. Cutting Financial Waste](book/05-cutting-financial-waste.md) |
| Which wellness supplements, commercial health checkup packages, and trendy consumer traps should you never buy? | [6. The Anti-Checklist](book/06-the-anti-checklist.md) |
| When unemployed, unpaid, or broke, what statutory subsidies can you claim, and where can you access immediate emergency aid? | [7. Surviving Broke](book/07-surviving-broke.md) |
| How are marital gifts, pre-marital real estate, and financial transfers treated by law; what must you do first if accused or falsely reported; how much sentencing relief does surrender provide? | [8. Staying Out of Trouble](book/08-staying-out-of-trouble.md) |
| Which seemingly harmless side hustles and casual favors turn ordinary citizens into criminal defendants? | [9. Everyday Legal Traps](book/09-everyday-legal-traps.md) |
| Should dating cast a wide net or focus on one person; can long-distance relationships survive; what documentation is needed to register a marriage? | [10. The Economics of Dating and Marriage](book/10-the-economics-of-dating-and-marriage.md) |
| What code architectures, freelance gigs, and data scraping practices trigger criminal charges for software developers? | [11. Legal Boundaries for Developers](book/11-legal-boundaries-for-developers.md) |
| What must you calculate before borrowing capital to launch a business, open a retail shop, or register a company? | [12. Starting and Running a Business](book/12-starting-and-running-a-business.md) |
| Someone collapses without breathing, suffers massive hemorrhaging, or is trapped in a fire—what exact actions do you take in the first 60 seconds? | [13. Handling Emergencies](book/13-handling-emergencies.md) |
| Your smartphone is lost, an account is breached, or your identity is compromised—what triage steps prevent financial drain? | [14. Digital Security and Privacy](book/14-digital-security-and-privacy.md) |
| How do you prevent withheld rental deposits, unlawful evictions, and predatory mortgage contracts? | [15. Renting and Buying a Home](book/15-renting-and-buying-a-home.md) |
| Following a chronic disease diagnosis, how do you manage medication compliance, insurance reimbursement, and prevent complications? | [16. Managing Chronic Illness](book/16-managing-chronic-illness.md) |
| How do you legally arrange elder guardianship, estate planning, and protect family assets from predatory retirement schemes? | [17. Caring for Aging Parents](book/17-caring-for-aging-parents.md) |
| What maternity benefits can you claim, and what is the rigorous financial and time balance sheet of having a child? | [18. The True Cost of Raising Kids](book/18-the-true-cost-of-raising-kids.md) |
| How do you calculate statutory severance, overtime compensation, and secure workers' compensation benefits after a job injury? | [19. Workplace Rights and Injuries](book/19-workplace-rights-and-injuries.md) |
| In the first 90 days of a newborn's life, what clinical safety guidelines and statutory registrations are vital? | [20. Newborn Survival Guide](book/20-newborn-survival-guide.md) |
| Which countries carry travel warnings, and where do consular protections begin and end during overseas crises? | [21. International Travel Safety](book/21-international-travel-safety.md) |
| How do you avoid traps in entertainment venues, and what evidence-based protocols rapidly lower acute autonomic stress? | [22. Science-Backed Relaxation](book/22-science-backed-relaxation.md) |
| Which vocational credentials and learning methods yield positive economic returns, and how do you study to retain information? | [23. High-Leverage Skills to Learn](book/23-high-leverage-skills-to-learn.md) |
| How do you navigate emergency triage, evaluate cross-regional medical treatment, and access statutory disease emergency funds? | [24. Navigating Healthcare](book/24-navigating-healthcare.md) |
| What legal, funerary, and probate steps must be completed immediately when a family member passes away? | [25. Handling End-of-Life Affairs](book/25-handling-end-of-life-affairs.md) |
| What regulatory licenses, tax reporting, and hosting infrastructure are mandatory to legally launch an internet platform? | [26. Building a Compliant Platform](book/26-building-a-compliant-platform.md) |
| From prenatal checkups through delivery and statutory registration, what protocols ensure maternal and infant safety? | [27. Pregnancy and Childbirth](book/27-pregnancy-and-childbirth.md) |
| Which weight-loss products, crash diets, and cosmetic surgery procedures pose severe health and blindness risks? | [28. Appearance vs. Health](book/28-appearance-vs-health.md) |
| Following bereavement, a terminal diagnosis, or severe trauma, what steps protect psychological and physical functioning? | [29. Recovering from Major Life Blows](book/29-recovering-from-major-life-blows.md) |
| For school-age children, what acute physical and psychological symptoms cannot wait until after exams to treat? | [30. Raising School-Age Kids](book/30-raising-school-age-kids.md) |
| What legal pathways exist after age eighteen beyond university and wage labor, and what are their statutory thresholds? | [31. Life Paths After Eighteen](book/31-life-paths-after-eighteen.md) |
| How do international students protect their visa status, insurance coverage, and secure degree validation? | [32. Studying Abroad Pragmatically](book/32-studying-abroad-pragmatically.md) |
| Following disability, how do you prevent lethal complications, secure statutory subsidies, and assert workplace rights? | [33. Navigating Life with Disability](book/33-navigating-life-with-disability.md) |
| Which common OTC cold, fever, and stomach medications must never be combined, and which are contraindicated for children and seniors? | [34. Safe Home Medication](book/34-safe-home-medication.md) |
## How to Read This Book
- **You do not need to do everything**: This is a ranked catalog of high-ROI options, not an onerous task list. Adopting even one or two rules provides immediate, compounding benefits; leave the rest and return when circumstances warrant. It is completely natural that implementing these rules is harder than reading them—the author has not mastered most of them either. If you want the lowest-effort options, review the rules flagged as **ROI: Very High**.
- **Query via AI**: This repository includes a specialized agent prompt ([skills/life-decision-guide/SKILL.md](skills/life-decision-guide/SKILL.md)) compatible with Claude Code, Codex, and other AI systems. Once installed, ask questions such as *"Should I co-sign a loan for a friend?"* or *"Is a 2-hour daily commute worth cheaper rent?"*. The agent retrieves the relevant rules and formulates a structured calculation citing exact chapter and rule numbers without hallucinating data.
- **Filter by Criteria**: Open the [Online Reader](https://parveen0029.github.io/The-Evidence-Based-Life/) to search by keyword, chapter, evidence grade, or filter by cost dimensions (money, time, willpower). The web application parses the Markdown files directly from the repository.
- **Cross-References Between Rules**: Throughout the text, citations link related rules (e.g., "see Section 8, Rule 17"). In the web application, clicking these links displays an instant preview of the referenced rule without losing your place.
- **Read Sequentially**: Rules within each chapter are ranked from highest to lowest ROI. Simply reading the first few rules of each chapter covers the highest-leverage interventions.
- **Offline Reading & Sharing**: Download the [Offline Single-File HTML](https://github.com/parveen0029/The-Evidence-Based-Life/releases/download/epub-latest/The-Evidence-Based-Life.html). The entire corpus, including search and filter capabilities, is self-contained in a single file that opens in any browser without internet access or web servers.
- **Print or Mobile Reading**: Download the [PDF Edition](https://github.com/parveen0029/The-Evidence-Based-Life/releases/download/epub-latest/The-Evidence-Based-Life.pdf), formatted with clean typography, page numbers, bookmarks, and chapter page breaks.
- **E-Reader & Kindle**: Download the [EPUB Edition](https://github.com/parveen0029/The-Evidence-Based-Life/releases/download/epub-latest/The-Evidence-Based-Life.epub), easily transferred via Send to Kindle or standard e-reader apps.
- **"In Plain Terms" Summaries**: Every rule features an *In plain terms* summary. It translates complex statistical figures from the Benefit section into everyday vernacular (e.g., "reduces mortality risk by roughly 12% over 5 years"). It relies strictly on findings documented in the Benefit field without introducing unsourced numbers.
- **Focusing on the Strongest Evidence**: In the web reader, select **Evidence Grade A** to display only the 429 rules supported by randomized controlled trials, large-scale cohorts, or comprehensive meta-analyses.
- **Focusing on Maximum ROI**: Select **ROI: Very High** to filter for rules requiring virtually zero money, minimal time, and negligible willpower while delivering substantial returns.
Every rule follows this consistent, verifiable structure:
```markdown
### 5. Replace standard household table salt with potassium-enriched low-sodium salt
- Cost: A bag costs slightly more than standard table salt. Swapped during routine grocery shopping; requires zero additional daily time. Taste differences are negligible.
- In plain terms: In a randomized trial of 20,000 individuals, switching household salt to a low-sodium potassium blend reduced the 5-year risk of death by about 12% and stroke by roughly 14%. Because participants were randomized into two groups, this finding is far more reliable than simple observational tracking.
- Benefit: A cluster-randomized trial in rural China involving 20,995 individuals (either with a history of stroke or aged 60+ with hypertension) followed participants for a median of 4.74 years. Results: The intervention group experienced a 12% lower risk of all-cause mortality (RR 0.88), a 14% lower risk of stroke (RR 0.86), and a 13% lower risk of major adverse cardiovascular events (RR 0.87).
- Evidence grade: A
- Sources: Neal B et al. (2021). Effect of Salt Substitution on Cardiovascular Events and Death. New England Journal of Medicine. https://doi.org/10.1056/NEJMoa2105675
- Notes: Disputed for general healthy populations. Trial participants were high-risk seniors; benefits for young, healthy adults are substantially smaller. Individuals with severe renal impairment or those taking potassium-sparing diuretics must consult their physician before switching due to hyperkalemia risk.
```
## Running Your Own Copy
For most readers, no local deployment is necessary: use the [Online Reader](https://parveen0029.github.io/The-Evidence-Based-Life/) or download the [Offline Single-File HTML](https://github.com/parveen0029/The-Evidence-Based-Life/releases/download/epub-latest/The-Evidence-Based-Life.html).
To run locally on your computer or private server:
```bash
git clone https://github.com/parveen0029/The-Evidence-Based-Life.git
cd The-Evidence-Based-Life
python -m http.server 8000
```
Open `http://localhost:8000/` in your browser. The web reader is fully static: `README.md` and `book/` serve as its database, with zero backends, zero external databases, and zero required dependencies. Note that `index.html` must be served via HTTP; opening the local file directly via `file://` triggers browser cross-origin security restrictions on local file reads (use the offline HTML build for direct double-click viewing).
To compile the e-book distributions locally:
```bash
cd tools/epub && npm ci && npm run build # EPUB
node tools/offline/build.mjs # Offline single-file HTML
node tools/pdf/build.mjs # PDF (requires pandoc >= 3.1 and typst >= 0.13)
```
Generated distribution artifacts are placed in `dist/`.
## Four Core Currencies
This book aims to protect four finite, irreplaceable human currencies:
- **Lifespan**: Living longer and avoiding preventable mortality.
- **Time & Energy**: Freeing daily hours from zero-return tasks and eliminating unnecessary physical and cognitive fatigue.
- **Financial Wealth**: Eliminating predatory fees, interest traps, and unrecoverable waste; allocating capital where returns are empirical.
- **Personal Freedom**: Avoiding ignorance of legal red lines that can lead to administrative detention, criminal indictment, or loss of liberty.
Every rule evaluates: What costs are consumed (Money / Time / Willpower), and what returns are delivered (Reduction in All-Cause Mortality / Specific Disease Reduction / Time & Energy Saved / Money Preserved / Legal Safeguards & Liberty). Rules are ordered by ROI, not arbitrary taxonomy: low-cost, high-benefit actions appear first.
**Beneficiary Tiers**: Benefits are categorized by who ultimately receives them:
1. **You directly**;
2. **Your spouse and direct family** (parents, children, grandparents, grandchildren);
3. **Friends, colleagues, and broader social network** (reciprocal relationships);
4. **Strangers** (lowest probability of direct return, accompanied by potential legal liability and extortion risks).
Emergency protocols reflect this reality: out-of-hospital cardiac arrest occurs in homes in nearly 80% of cases—learning CPR primarily protects your immediate family. Rules regarding intervening with strangers detail statutory protections, self-protection steps, and realistic liability risks.
## Evidence Grading
Every recommendation is assigned an evidence grade:
| Grade | Scientific Standard |
| --- | --- |
| **A** | Quantified outcomes derived from comprehensive meta-analyses, large-scale multi-year prospective cohorts, or randomized controlled trials (RCTs), providing concrete effect sizes (HR, RR, percentage reductions). |
| **B** | Supported by peer-reviewed literature, but lacking large-scale replication, precise effect quantification, or derived from smaller observational cohorts. |
| **C** | Authoritative empirical heuristics, consensus guidelines, or statutory frameworks lacking direct epidemiological clinical trials. |
Across all 649 rules: Grade A: 429 | Grade B: 171 | Grade C: 49, with 55 rules noted for controversy or ongoing debate. Controversial rules outline counter-evidence in the Notes field. Citations reference primary literature directly (journal papers with DOI/PubMed links or official reports from WHO, CDC, and government statistical agencies).
## Return-on-Investment (ROI) Tiers
Evidence grading answers *"How reliable is this data?"*, but does not answer *"Is this action worth doing?"*. Each rule additionally specifies benefit magnitude and metric type, synthesized into an ROI rating:
| Dimension | Classification | Methodology |
| --- | --- | --- |
| **Metric Type** | Lifespan / Wealth / Time & Energy / Freedom | Identifies the primary currency reclaimed. Metrics are not conflated: a 12% mortality reduction cannot be mathematically equated to saving $500. |
| **Benefit Magnitude** | High / Medium / Low | Evaluated objectively against pre-set thresholds: Lifespan reduction >= 20% is High, 10–20% Medium, < 10% Low; Wealth preservation in thousands of dollars is High; Freedom protections avoiding criminal prosecution are High. |
| **ROI Ratio** | Very High / High / Moderate | High benefit combined with zero cost = Very High; High benefit with low cost, or Medium benefit with zero cost = High; all others = Moderate. |
Across all 649 rules: **Very High: 111 (17%) | High: 294 (45%) | Moderate: 244 (38%)**. The ROI tier reflects analytical prioritization; a rating of "Moderate" does not mean a rule should be ignored, but rather that the individual must weigh the associated cost against their personal circumstances.
## Glossary: Understanding the Numbers
The text uses accessible language, but citing scientific research requires statistical terminology. Consult this reference whenever encountering unfamiliar terms: