If you’re going to do something, do it 100%. If you are going to procrastinate, do it 100% so it becomes a pure activity.
If you a) avoid an unwanted task by procrastinating and b) do something rather pleasant and mildly fulfilling during that time (tidy up, make labels, make another cup of tea) you are double-dipping into the Rewards Jar with both positive and negative reinforcement at play.
Procrastination. If procrastination is causing you problems, it might be because you make it so rewarding. Whatever you find rewarding will be repeated. Here’s an escape route for you.