Parkinson's Law

If

"Work expands so as to fill the time available for its completion." Give a task a week and it takes a week; the same task with a two-day deadline ships in two days. Slack is consumed, not banked.

Then

Set deliberately short timeboxes for open-ended work and review at the deadline. A tight box forces the scoping decisions an open one defers forever.

Unless

Timeboxing