To actually reduce the amount of stuff I have, I need to keep throwing out paperwork every day, as I am continually receiving things for pleasure and for work or admin purposes. This means going through things and also doing things I've put off doing. Today I completed a feedback form for a homeopath that I've been putting off because I wanted to give the most accurate feedback. Perhaps the lesson here is that we need to do enough, not too much - too high standards means we either put too much into things that don't matter enough (my homeopath won't mind me only writing 20 lines not 40!) or we procrastinate and have huge boring 'to-do' files.
I also threw out a guidebook I'll never read again to a church that's only open once a year. It would be better to give it back, but never mind - I'm not going to remember in a year's time to go back!
Decluttering tip - you are not perfect! Be selective about what you put your energy into.