The Eight Honest Inputs to Good Sleep

One: a consistent bedtime, held within about thirty minutes across the week. Two: morning light within the first hour of waking, ideally outdoors. Three: cardiovascular movement earlier in the day rather than late evening. Four: last meal at least two to three hours before bed. Five: caffeine cutoff by early afternoon; the half-life is longer than most people realise. Six: alcohol as an occasional, not habitual, guest — it suppresses REM. Seven: a cool, dark, quiet room. Eight: a wind-down that begins thirty to sixty minutes before lights-out and does not include work, argument, or bright screens.

None of these needs to be perfect. What is being invited is not an optimised sleep protocol. It is a nervous system that has honestly received the standard cues it evolved to expect. Most people find that improving three or four of the eight, consistently, moves sleep quality more than any single dramatic intervention.

Each of the eight inputs is a small message: the day is over, the environment is safe, the schedule is predictable, the rest can begin. The nervous system does not need to be argued with. It needs to be given accurate information. Given the information, it tends to do the sleeping on its own.