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Rhythm and Light

Notes on rhythm and light, written after living with it rather than reading about it.

Structuring the first hour after waking: a practical plan for ordinary weeks
Rhythm and Light

Structuring the first hour after waking: a practical plan for ordinary weeks

Separate two things in structuring the first hour after waking: the outcome you want and the action you can sustain. When the gap is too wide, shrink…

Rosalind KerrRosalind Kerr·June 23, 2026·4 min read
How morning light sets the clock: nine specific questions
Rhythm and Light

How morning light sets the clock: nine specific questions

Put how morning light sets the clock back into a real week, with overtime, travel and days you cannot be bothered. Any plan that only survives good…

Emory BlakeEmory Blake·June 17, 2026·4 min read
The half-life of caffeine: a practical plan for ordinary weeks
Rhythm and Light

The half-life of caffeine: a practical plan for ordinary weeks

Put the half-life of caffeine back into a real week, with overtime, travel and days you cannot be bothered. Any plan that only survives good months…

Maeve DonnellyMaeve Donnelly·June 11, 2026·4 min read
A two-hour pre-bed checklist: the full sequence and where it drifts
Rhythm and Light

A two-hour pre-bed checklist: the full sequence and where it drifts

Most people do not fail at a two-hour pre-bed checklist from misunderstanding it. They fail because understanding is not doing. What follows is the…

Thea BergstromThea Bergstrom·June 5, 2026·4 min read
Shift work without wrecking your week: a practical plan for ordinary weeks
Rhythm and Light

Shift work without wrecking your week: a practical plan for ordinary weeks

If you only read one paragraph, read this: shift work without wrecking your week depends on how the situation is set up, not on how you feel at the…

Rosalind KerrRosalind Kerr·May 30, 2026·4 min read
The right order after a night shift: judging it before you start
Rhythm and Light

The right order after a night shift: judging it before you start

Let us set the limits of the right order after a night shift first: it reliably improves a working feel for your own baseline, and it does not…

Emory BlakeEmory Blake·May 24, 2026·4 min read
Tracking sleep without obsessing: method, rhythm and limits
Rhythm and Light

Tracking sleep without obsessing: method, rhythm and limits

If you have already tried tracking sleep without obsessing and dropped it, the fault is usually in the setup: a starting point set too high, an…

Maeve DonnellyMaeve Donnelly·May 18, 2026·4 min read
Alarm setups for heavy sleepers: making the complicated part simple
Rhythm and Light

Alarm setups for heavy sleepers: making the complicated part simple

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…

Thea BergstromThea Bergstrom·May 12, 2026·4 min read
What to do instead of scrolling in bed: the order that saves effort
Rhythm and Light

What to do instead of scrolling in bed: the order that saves effort

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…

Rosalind KerrRosalind Kerr·May 6, 2026·4 min read
Naps and neck pain: a practical plan for ordinary weeks
Rhythm and Light

Naps and neck pain: a practical plan for ordinary weeks

Anyone who has spent time on naps and neck pain has a failure story: a strong start, a collapse in the middle, then silence. This is not another…

Emory BlakeEmory Blake·April 30, 2026·4 min read
How long natural waking takes: making the complicated part simple
Rhythm and Light

How long natural waking takes: making the complicated part simple

There is plenty written about how long natural waking takes and little you can act on. This piece stays concrete: every action can be done on the…

Maeve DonnellyMaeve Donnelly·April 24, 2026·4 min read
Can a disrupted clock be reset: a practical plan for ordinary weeks
Rhythm and Light

Can a disrupted clock be reset: a practical plan for ordinary weeks

Separate two things in can a disrupted clock be reset: the outcome you want and the action you can sustain. When the gap is too wide, shrink the…

Thea BergstromThea Bergstrom·April 18, 2026·4 min read
How soon to eat after waking, explained once properly
Rhythm and Light

How soon to eat after waking, explained once properly

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.…

Rosalind KerrRosalind Kerr·April 12, 2026·4 min read
Evening exercise and sleep onset: three things to understand first
Rhythm and Light

Evening exercise and sleep onset: three things to understand first

There is plenty written about evening exercise and sleep onset and little you can act on. This piece stays concrete: every action can be done on the…

Emory BlakeEmory Blake·April 6, 2026·4 min read
Light, mood and the short days: method, rhythm and limits
Rhythm and Light

Light, mood and the short days: method, rhythm and limits

Most people do not fail at light, mood and the short days from misunderstanding it. They fail because understanding is not doing. What follows is the…

Maeve DonnellyMaeve Donnelly·March 31, 2026·4 min read
Handling jet lag on arrival: judging it before you start
Rhythm and Light

Handling jet lag on arrival: judging it before you start

Let us set the limits of handling jet lag on arrival first: it reliably improves a body that copes with season changes, and it does not deliver…

Thea BergstromThea Bergstrom·March 25, 2026·4 min read
Why a fixed wake time beats a fixed bedtime: what to do and what to skip
Rhythm and Light

Why a fixed wake time beats a fixed bedtime: what to do and what to skip

Advice on why a fixed wake time beats a fixed bedtime tends to split in two: impossibly complex, or sold as one click. Reality sits between. It needs…

Rosalind KerrRosalind Kerr·March 19, 2026·4 min read
Eight hours and still tired: judging it before you start
Rhythm and Light

Eight hours and still tired: judging it before you start

Most people do not fail at eight hours and still tired from misunderstanding it. They fail because understanding is not doing. What follows is the…

Emory BlakeEmory Blake·March 13, 2026·4 min read
How to take a twenty-minute nap: the order that saves effort
Rhythm and Light

How to take a twenty-minute nap: the order that saves effort

Most people want how to take a twenty-minute nap to make things better. The workable version of that goal is steadier: a floor you can hit on a bad…

Maeve DonnellyMaeve Donnelly·March 7, 2026·4 min read
What weekend catch-up sleep really fixes: the full sequence and where it drifts
Rhythm and Light

What weekend catch-up sleep really fixes: the full sequence and where it drifts

If you only read one paragraph, read this: what weekend catch-up sleep really fixes depends on how the situation is set up, not on how you feel at…

Thea BergstromThea Bergstrom·March 1, 2026·4 min read