Eliminate interruptions before the session

Flow collapses the moment attention is redirected — build a distraction-proof container before you start.

Why it works

Attention is restored slowly after interruption: research on attention residue shows that even brief task-switches leave cognitive "threads" active for up to 20 minutes, preventing the full attentional absorption that defines flow. Each notification or self-interruption resets the accumulation of concentration that flow requires.

How to do it

1. Put your phone in another room or enable full Do Not Disturb at the device level (not just silent).
2. Close every browser tab and application not needed for the task.
3. Tell any co-present people you are unavailable for the block’s duration.
4. Use a visible timer so you know the interruption-free period is finite.

Evidence

Attention residue studies find that task-switching impairs performance on the next task for measurable durations, consistent with the mechanism that flow requires sustained, unbroken attention. A separate experiment found that the mere presence of one’s own smartphone — even silenced and face-down — reduces available cognitive capacity, grounding why physical distance from the device, not just silencing it, matters. (observational)

The attention residue study measures performance impairment, not flow state specifically; the link to flow is mechanistic.

Sources

• Leroy (2009), attention residue effect, Organizational Behavior and Human Decision Processes
• Leroy, S. (2009). Why is it so hard to do my work? The challenge of attention residue when switching between work tasks. Organizational Behavior and Human Decision Processes, 109(2), 168–181.
• Ward, A. F., Duke, K., Gneezy, A., & Bos, M. W. (2017). Brain drain: The mere presence of one’s own smartphone reduces available cognitive capacity. Journal of the Association for Consumer Research, 2(2), 140–154.

Common mistake

Silencing the phone but leaving it face-up on the desk — even the sight of a smartphone reduces available working memory in studies, so physical distance matters.