The Rhythm and Light archive: start at the top, or jump to what you need.

Let us set the limits of getting to bed before eleven first: it reliably improves a working feel for your own baseline, and it does not deliver…

If you only read one paragraph, read this: recovering from a late night depends on how the situation is set up, not on how you feel at the time.…

Most people do not fail at structuring the first hour after waking from misunderstanding it. They fail because understanding is not doing. What…

There is plenty written about how morning light sets the clock and little you can act on. This piece stays concrete: every action can be done at the…

Most people want the half-life of caffeine to make things better. The workable version of that goal is steadier: a floor you can hit on a bad day.…

Anyone who has spent time on a two-hour pre-bed checklist has a failure story: a strong start, a collapse in the middle, then silence. This is not…

Separate two things in shift work without wrecking your week: the outcome you want and the action you can sustain. When the gap is too wide, shrink…

Put the right order after a night shift back into a real week, with overtime, travel and days you cannot be bothered. Any plan that only survives…

Most people do not fail at tracking sleep without obsessing from misunderstanding it. They fail because understanding is not doing. What follows is…

Separate two things in alarm setups for heavy sleepers: the outcome you want and the action you can sustain. When the gap is too wide, shrink the…

If you only read one paragraph, read this: what to do instead of scrolling in bed depends on how the situation is set up, not on how you feel at the…

Advice on naps and neck pain tends to split in two: impossibly complex, or sold as one click. Reality sits between. It needs some patience and some…

Anyone who has spent time on how long natural waking takes has a failure story: a strong start, a collapse in the middle, then silence. This is not…

Anyone who has spent time on can a disrupted clock be reset has a failure story: a strong start, a collapse in the middle, then silence. This is not…

If you only read one paragraph, read this: how soon to eat after waking depends on how the situation is set up, not on how you feel at the time.…

Most people do not fail at evening exercise and sleep onset from misunderstanding it. They fail because understanding is not doing. What follows is…

Advice on light, mood and the short days tends to split in two: impossibly complex, or sold as one click. Reality sits between. It needs some…

Most people want handling jet lag on arrival to make things better. The workable version of that goal is steadier: a floor you can hit on a bad day.…

If you only read one paragraph, read this: why a fixed wake time beats a fixed bedtime depends on how the situation is set up, not on how you feel at…

Most people want eight hours and still tired to make things better. The workable version of that goal is steadier: a floor you can hit on a bad day.…