When does the brilliant idea strike? When do you remember you’re desperately low on milk?
It’s rarely when you’re actually sitting down, pen in hand, to make a relevant list.
But if you don’t write it down right away, it’s gone.
Hence, the need for ubiquitous capture.
Ubiquitous capture is a term from David Allen’s Getting Things Done that basically means you should always have a way to write down, right away, any information you need to have rather than assuming you’ll remember it or remember to write it down later.