Day 12 of 90 · Sleep
Cool, dark, quiet bedroom
“I taped over the charger light and cracked the window. Small fixes, deeper sleep.” — Kai

Today's action · 10 min
Spend ten minutes fixing your bedroom: cover or turn away glowing lights, close the curtains properly, and set the room a little cooler. Earplugs or an eye mask count too.
Why it works
The NHLBI's healthy sleep advice is simple: keep your bedroom quiet, cool and dark, with a dim night light only if you need one. These are cheap, low-effort changes to the place where your sleep habit lives.
Source: Sleep Deprivation and Deficiency: Healthy Sleep Habits (NHLBI (NIH))
Educational content, not medical advice. If you are struggling, contact a qualified professional (Lifeline 13 11 14 in Australia, 988 in the US).