Everyday essentials

The things that actually move the needle for a longer, healthier life, as plain everyday rules — each with how strong the evidence really is.

Movement & sport

The single most powerful lever we have. Almost nothing else comes close.

Move most days — even a little beats none. — The biggest drop in mortality comes from the very first bit of activity; going from nothing to something matters most. (strong evidence)
Do some strength training twice a week. — Muscle predicts healthspan and independence as you age; two short sessions is enough to start. (strong evidence)
Get out of breath sometimes — protect your fitness. — Cardiorespiratory fitness (VO₂max) is one of the strongest predictors of a long life. (strong evidence)

Not smoking is the biggest single modifiable factor for a long life.

Don't smoke — and if you do, quitting early undoes most of the harm. — Smoking cuts roughly 10 years of life; quitting before 40 avoids about 90% of the excess risk. (strong evidence)
Don't treat vaping as a proven-safe habit. — It is likely less harmful than cigarettes and can help some people quit — but long-term safety is not established, and non-smokers should not start. (mixed evidence)

Whole fruit is fine for almost everyone. The issue is added and liquid sugar.

Cut sugary drinks first — eat whole fruit freely. — Liquid sugar is the clearest harm; whole fruit comes packaged with fibre and is very hard to overeat. (strong evidence)
Read labels for "added sugar", not fruit or dairy sugar. — The sugar molecule is not a poison — dose, liquid form and total excess energy are what matter. (good evidence)

Mostly plants, enough protein, not too much. The boring basics win.

Eat a wide variety of plants; most people need more fibre. — Fibre intake tracks with lower mortality, and plant diversity feeds a healthier gut microbiome. (good evidence)
Make legumes a habit. — Beans and lentils were the single strongest dietary predictor of survival across five cultures. (good evidence)
Get enough protein — more as you get older. — Protein protects muscle and appetite; ageing muscle needs a bigger per-meal dose to respond. (strong evidence)
Keep weight in a healthy range — gradually, not by crash dieting. — Both overweight and obesity raise mortality across populations; slow change sticks, crash diets rebound. (strong evidence)

No health upside. The value is social — so make the trade-off with open eyes.

For health, less is better and none is safest. — The old "moderate drinking is protective" J-curve is now largely explained by study flaws; risk rises with intake. (strong evidence)
If you drink, keep it occasional and protect your sleep. — Alcohol wrecks sleep quality and next-day recovery even when it helps you fall asleep. (strong evidence)

Good news for most: moderate coffee is fine, even helpful.

3–5 cups of coffee a day is fine for most people. — Moderate intake is consistently linked to lower all-cause and cardiovascular mortality in large cohorts. (good evidence)
Stop caffeine ~8–10 hours before bed. — Afternoon caffeine quietly erodes deep sleep even if you fall asleep fine. (good evidence)

The foundation that powers everything else. Non-negotiable.

Aim for about 7–9 hours; ~7 is the sweet spot. — Both too little and too much sleep track with higher mortality (a U-shaped curve). (strong evidence)
Keep a consistent sleep and wake time. — Regularity may matter as much as duration for mood, metabolism and alertness. (good evidence)

Chronic stress is a physical risk factor, not just a mood.

Build a small daily "down-regulation" habit. — A few minutes of slow breathing, a walk or time in nature blunts the chronic-stress load that raises cardiovascular risk. (good evidence)
Treat sunlight and daily movement as mood medicine. — Morning daylight and regular activity are among the best-supported, free things for mood and sleep. (good evidence)

As strong a predictor of long life as many medical interventions — and free.

Invest in real relationships. — Strong social ties are linked to roughly 50% higher survival — an effect size comparable to major medical risk factors. (strong evidence)
Have a reason to get up in the morning. — A sense of purpose is associated with lower all-cause mortality. (good evidence)