The two-minute rule for getting things done

If something takes less than two minutes, do it now instead of adding it to a list.

Reply to that message. Put the dish in the dishwasher. Pay that bill. Writing it down and remembering it later takes more effort than just doing it.

For bigger things, use the other half of the rule: start for two minutes. Want to go running? Put your shoes on. Need to write a report? Open the file and write one sentence. Starting is the hardest part, and two minutes is short enough that your brain doesn't argue.