Sleep, Exercise, Food

Here's the dirty secret of every system in this course: it doesn't work if you're a wreck biologically. The best capture-decide-do flow, the best calendar, the best AI tool — all of them lose to sleep deprivation, no movement, and bad food.

Three things to get right before any system matters.

1. Sleep — 7 To 9 Hours

Consistent times. Dark room. Phone outside the bedroom if you can manage it.

If you're sleeping six and telling yourself you've adapted — you haven't. The research is unanimous. Cognitive performance after a week of six-hour nights is comparable to someone who's been awake 24 hours straight. You don't feel it because your baseline shifted. You feel "normal" while operating at 70%.

This is the single highest-leverage health move you can make. Free, available tonight.

2. Exercise — 3 To 5 Times A Week

Anything that raises your heart rate for 30 minutes counts. Walking counts. You don't need a gym.

The research on exercise and cognitive function is overwhelming: better focus, better memory, better mood, lower burnout risk. The most productive senior people in any field tend to also be the most consistent about movement. Not coincidence.

If you can only do one thing for your brain this year, this is it.

3. Food — Stop The Obvious Damage

You don't need a perfect diet. You need to stop the things that actively wreck your productivity:

• Big sugar crashes mid-afternoon — gut your post-lunch hours;
• Heavy lunch — kills your peak afternoon attention;
• Daily heavy drinking — destroys the next day's deep work capacity.

Each one wrecks the next day. Stop those three and most people see a real focus difference within a week.

The Hard Truth

None of this is exciting. None of it is the new tip. It is the foundation.

People who ignore it spend the next 20 years tweaking apps and reading productivity books to compensate for sleep they're not getting. Don't be them. Get the foundation right first.