Most environmental cues are surprisingly small. A lamp at the same brightness, a familiar sound at the same level, a bedroom that smells calm — together they begin to feel like a single, recognisable signal.
A gentle light shift
Dim the lights in the same order each evening. The brain reads the sequence as preparation, not interruption.
Sound you barely notice
Pick a sound that fades into the room. The point is a quiet background, not a playlist you notice.
Temperature as a cue
A 1-2 degree drop in room temperature signals the body to begin thermoregulation toward sleep. The cue is felt, not heard.
A cue you can feel without noticing is the strongest kind.
