Explore each chapter to understand the effort, benefits and context.
Wearing a seat belt in the front seat cuts your risk of a fatal injury in a crash by roughly half; in the front of a light truck, by about 60%. Among US vehicle occupants killed in 2022 whose belt use was known, half were unbelted.
People walking about 5,800 steps daily had roughly 40% lower mortality than those walking 3,500; at about 7,800 steps the difference was 45%. Benefits rise further before flattening. For people over 60, the plateau was around 6,000–8,000 steps.
A notification can impair attention even if you do not look at or touch your phone, by an amount comparable to taking a call or texting. Even resisting a phone sitting on the desk can leave less mental capacity available. People most dependent on their phones showed the largest drop.
The savings come from subscriptions you stopped using but still pay for. Review automatic payments in Alipay, WeChat, Apple, and Android; the source estimates under 20 minutes. Chinese rules require a prominent renewal reminder and an easy-to-find, easy-to-use cancellation option available at any time.
Two-step verification asks for something beyond your password to confirm that it is really you signing in. In the study cited below, a prompt on a trusted phone blocked more than nine out of ten phishing-based takeover attempts. Older checks, such as asking where you last signed in or what your recovery email is, blocked as few as one in ten.
Replace a vague intention with that concrete sentence. Across 94 tests, people using this format achieved goals more often, with a medium-to-large effect. The change is in how you state the plan, without extra spending or much effort.
A helmet with its chin strap fastened lowers a motorcyclist's risk of dying in a crash by about 40% and of head injury by about 70%. Tighten the strap: a helmet resting loosely on your head does not count.
A working smoke alarm can lower the risk of death in a house fire by about 60%. Around four in ten victims were asleep when the fire began; smell alone will not reliably wake you. If you burn coal or use gas indoors in winter, add a carbon monoxide alarm. China recorded about 11,500 carbon monoxide deaths in 2018; in the three winter months, roughly 70% occurred at home.
A compliant hose costs only a few dozen renminbi. China's Regulations on the Administration of Urban Gas require users to replace expired equipment and prohibit unauthorized changes to pipework or removal of gas meters. The same regulations say a gas supplier cannot force you to buy its chosen products or services. You can refuse a door-to-door sales pitch claiming that you “must replace” something through that seller.
In China in 2025 alone, 828 mushroom-poisoning incidents affected 2,165 people and killed 13. That year also brought records of 34 species not previously documented as causing poisoning in China. Silver needles, insect bites and bright colors cannot tell you whether a mushroom is safe.
The source describes bringing e-bikes into corridors or elevators and charging them at home as prohibited by China's high-rise fire-safety rules. Refusing to correct a violation can mean an RMB 500–1,000 fine for non-business users, or RMB 2,000–10,000 for businesses. The bigger issue is a fire blocking your only escape route.
For every 10 mmHg reduction in blood pressure, major cardiovascular problems fall by about 20%, stroke by 27%, heart failure by 28% and death by 13%. Among Chinese adults aged 35–75, 44.7% had hypertension, and only 7.2% of those affected had it controlled.