Use scheduled Do Not Disturb windows for focus and sleep

Set DND automatically for your deep work hours and for sleep — do not rely on remembering to enable it manually.

Why it works

Manual DND activation requires a decision at the exact moment when incoming notifications are most tempting; automated scheduling removes the decision entirely. The brain cannot fully enter recovery or focus mode while anticipating incoming signals — a scheduled DND window sends a credible signal to the cognitive system that no new information is incoming, enabling deeper engagement or rest.

How to do it

1. On iOS: Focus → Custom Focus → add Automated schedule for work hours and sleep.
2. On Android: Settings → Sound → Do Not Disturb → Schedules.
3. Allow through calls from starred contacts and repeated calls (genuine emergencies) while blocking everything else.
4. Set DND for at least one 2-hour focus block per day and for the 8-hour sleep window.

Evidence

Anticipatory attention to possible notifications creates cognitive load even in the absence of actual interruption; scheduled DND removes the anticipation, not just the notification. (mechanistic)

The Stothart study measured cognitive cost from receiving a notification versus merely knowing the phone could buzz; the DND-as-anticipation-removal mechanism is an extrapolation from that finding.

Sources

• Stothart, Mitchum & Yehnert (2015), "The attentional cost of receiving a cell phone notification," Journal of Experimental Psychology: Human Perception and Performance

Common mistake

Setting DND to allow exceptions for too many contact groups — which recreates full alert behavior under a DND label.