You are not putting off five minutes of work. You are putting off what those five minutes set in motion. Your list measures a task in minutes, but your head measures it in consequences.
Take an email to a supplier whose price went up. Writing it takes you four lines. Sending it means you have to decide whether to keep them, and you might get an answer you don't like. The four lines were never the heavy part. The decision was.
Almost every small task you keep moving carries one of three triggers: a decision you haven't made, a reply you dread, or a result someone could judge. A task can be small in time and still heavy for you.
Read the full article: https://impruvement.com/blog/why-do-i-procrastinate-on-small-tasks-i-know-take-five-minut