Helping others declutter
Does helping other people declutter make you go home and declutter your own stuff? That's the experience I had recently. I helped a friend clear out some stuff at her mother's house. I went home and went through my closet and got rid of six pairs of shoes that should have been trashed long ago.
And I also noticed it was quick, easy and painless to declutter someone else's stuff. There was little second-guessing of my decisions.