I moved around a lot so had to be selective on what I’ve kept.

My goto was finding a home for everything. If I was keeping it, it needed a space I could put it when I was done. And not in a box labeled misc. or a shelf with everything else.

I do allow myself a “I want to keep this because I like it” box. But when it’s full I need to throw things out from it.

You’ll still have clutter, it’s unavoidable. But compared to before should be less.