How to get rid of your stuff (aka crap) you can't part with?

I was thinking about why does crap build up, too many books, shoes, tasks, friends, projects?

It's because you add new things but don't delete, remove, throw out stuff. If you can't stop getting new things then get rid of the old.

Try to get into the habit of throwing out two things every time you bring one thing into your home.

It's the same with tasks. If your to-do list is too big then don't add a new item until you complete/delete two items. If you don't want to delete items then don't add an "A" priority task without making two of them "B" priorities.