Stop watching the clock during the night

Remove or hide the clock to stop the "calculating how much sleep I have left" loop that activates the brain.

Why it works

Clock-watching during night wakefulness converts a neutral event (being awake) into a catastrophizing calculation ("It’s 3am, I only have 4 hours left, I’ll be destroyed tomorrow"). Each check raises cortisol and prolongs wakefulness. The act of checking also reinforces the vigilance that is characteristic of conditioned insomnia. Removing the clock removes the trigger for the calculation.

How to do it

1. Turn the clock face away from the bed or remove it from the bedroom.
2. Set an alarm and deliberately refrain from checking the time if you wake.
3. If you use a phone as an alarm, put it face-down or across the room.

Evidence

Clock-watching is a cognitive maintenance behavior described in Harvey’s cognitive model of insomnia; it is targeted in CBT-I as a perpetuating factor that sustains arousal during the night. (clinical)

Direct RCT evidence for hiding the clock as an isolated intervention is limited; it is part of the broader CBT-I protocol that has strong overall support.

Sources

• Harvey (2002), cognitive model of insomnia, Behaviour Research and Therapy

Common mistake

Checking the phone "just to see the time" and inevitably reading a notification, which delivers a dose of social stimulation mid-night.