The two-minute rule

If a clarified action takes under two minutes, do it now instead of tracking it.

Why it works

The overhead of capturing, organizing, and later re-engaging a tiny task can exceed the cost of just doing it. For very short actions, deferring is net-negative — it adds tracking load and a future context-switch. Doing them immediately keeps the system lean and prevents trivial items from accumulating into a demoralizing backlog.

How to do it

1. During clarifying, check whether the next action takes roughly two minutes or less.
2. If so, do it on the spot rather than adding it to any list.
3. If it is longer, defer it to the appropriate list or delegate it.

Evidence

A practical efficiency heuristic about the overhead of task-tracking; the two-minute threshold is Allen’s rule of thumb, not a studied cutoff. The underlying point — that switching and tracking carry real costs — is consistent with task-switching research. Experimental work by Rubinstein, Meyer, and Evans measured the time cost incurred each time attention is reconfigured for a different task, grounding the claim that deferring a tiny action is often net-negative. (mechanistic)

The "two minutes" number is arbitrary and practitioner-set; the principle is to avoid tracking overhead that exceeds the task itself.

Sources

• Rubinstein, J. S., Meyer, D. E., & Evans, J. E. (2001). Executive Control of Cognitive Processes in Task Switching. Journal of Experimental Psychology: Human Perception and Performance, 27(4), 763–797.
• Monsell, S. (2003). Task switching. Trends in Cognitive Sciences, 7(3), 134–140.

Common mistake

Letting the two-minute rule run loose during focused time so you keep doing little tasks instead of the deep work you sat down for — it belongs in the clarify step, not all day.