The Wind-Down Protocol

The single most common reason people cannot fall asleep is that they have not actually prepared to fall asleep until the moment they get into bed. Most people are running at full intensity all day, work, screens, stimulation, then expect the brain to switch off on command. It cannot. The transition from sympathetic to parasympathetic dominance, from alert wakefulness to genuine sleepiness, is not instantaneous. It requires a deliberate deceleration period. You have to downshift before you can stop.

• Dim lights throughout the living space. Transition from overhead fluorescents to warm lamps (or even red light). The light environment signals the SCN directly. Alternatively, high-quality blue-light-blocking glasses can achieve the same effect.
• Take any sleep-supporting supplements at the end of this window.

• Warm shower or bath. Not just great for relaxation: more importantly, the measurable core temperature drop that follows is the mechanism. The vasodilation of the skin draws heat from the body's core. Post-bath, core temperature falls and sleep onset is accelerated.
• End screen use. High-quality blue-light-blocking glasses help at the margins, but removing screens entirely is more effective.
• Lower stimulation. Even more disruptive than the blue light is what you are doing on those screens. You could put on a full blue-blocking helmet and still stare at the ceiling for hours if the last thing you did was doom-scroll TikTok. Reading (preferably not-too-exciting fiction) or journalling are far better alternatives.
• Cognitive offload. Write down everything occupying your attention: unfinished tasks, tomorrow's priorities, worries. The brain has a working memory system that actively rehearses unresolved items to prevent forgetting them. Externalising this content reduces the cognitive load carried into sleep, and it is more effective at clearing the mind than any amount of willpower applied directly to the problem of thinking too much.

• Breathing protocol. Box breathing (4 counts in / 4 counts hold / 4 counts out / 4 counts hold) or the physiological sigh (double inhale through the nose, extended exhale through the mouth) both activate the parasympathetic system within minutes. Ten minutes, done seated and not in bed, is more effective than any sedative at reducing sleep latency in people with racing minds.
• In bed. If sleep does not come within 20 minutes, get up. Go to a dim room and read something calming. Return to bed only when genuinely sleepy. This is stimulus control: it preserves the bed-sleep association and prevents the learned wakefulness that drives chronic insomnia.
• If you can: keep your phone out of your bedroom, or at the very least introduce friction to doom-scrolling. Physical RFID blockers that turn your phone into a dumb phone (such as Tap Out or Brick) are surprisingly effective and worth considering.