The habits that fix sleep are mostly free — they’re just hard to keep straight amid conflicting advice. This category translates real sleep research into things you can do tonight: how circadian rhythm actually works, why morning light beats any supplement, what caffeine and alcohol do to deep sleep, how to handle shift work and jet lag, and which “sleep hacks” the science quietly disagrees with. No fear-mongering, no miracle cures — just what’s well-supported, what’s marketing, and what to try first. Pair these guides with the right gear from our product categories to build a routine that holds.
