Going for many super short walks during the day. Office workers are supposed take a 5 minute stretch every hour to stretch, so use that. This helps me declutter the brain.
Starting a task is hard, but so is stopping! Attacking "hard" tasks with momentum instead of willpower: I don't want to organize the freezer. I can tidy the floor in the storage room. Then empty the laundry basket. Now I have momentum and can attempt a breaching maneuver on the freezer: throw away some old food from the freezer. Usually this snowballs into sorting the freezer. If it doesn't, then hey at least I threw out some old food.