Like others have stated, I go by how often I use an item. How often I’ve touched it over a few months, do I think about it, etc.

I also look for items that may have a dual purpose. For instance, do I need a meat shredder or will my hand mixer that I use for other tasks work for it? (It does) I also use this logic to prevent acquiring new items which is the other half of this equation. You don’t have to purge what you don’t acquire.

The last thing is being honest with myself. There are some hobbies I used to love doing, but have no desire now and will probably not have time to do anyways. So items related to those get sold/donated. It may seem financially wasteful, but it also provides a test for yourself on whether you actually will use the items. If you end up buying some of those things again, forgive yourself and keep them next time you think about it.