Work swells to fill the time you give it

In 1955, the historian Cyril Northcote Parkinson published in a magazine a half-joking observation that became immortal: "Work expands so as to fill the time available for its completion." His example was a retired lady who takes an entire day to send a postcard: an hour choosing it, another finding her glasses, half an hour on the address, two deciding whether to take an umbrella to the postbox. The same postcard a busy person dispatches in three minutes.

The trap is that available time is not a neutral container: it is an invitation. A task without a deadline becomes an infinite task. A one-hour meeting finds a way to last an hour, even if everything important was said in the first ten minutes.

And the practical application runs opposite to what you'd expect: it is not about rushing, but about giving smaller boxes. Set the task a slightly uncomfortable deadline —forty minutes, not "this week"— and let the constraint trim away the frills, the second-guessing and the extra laps on its own. It isn't magic: without room to swell, the work stays the size it really was.