Parkinson's Law
Any task will expand to fill the time available for it.
Why it matters
Long forms and open-ended processes take longer than they need to.
How to use it
- Set an expected time, such as "takes 2 minutes".
- Autofill what you already know.
- Remove steps that do not earn their place.
Example
Checkout with saved details finishes well below the time people expect, which feels delightful.