I have the same problem as you do with the clutter, so that's why I'm trying to get rid of some stuff. I'm trying to get it in my head that if I'm not using it now, haven't used it in a while and don't even remember having it; then I probably DON'T need it.
I'm really bad about keeping things that people don't want anymore/are getting rid of if it's cheap/free LOL. I love a bargain, but it's just sitting around not getting used, so I'm going to have a yard sale
If I don't sell everything, I'm either going to just take offers on it or just donate the rest of it because I don't want it coming back into the house, period. It needs to go somewhere. If I make $10 or $100 I don't really care, it's just about getting rid of stuff and making room for stuff I actually need/want/care about
Out with the old, in with the new
We could do a "get rid of the clutter" challenge. Like 1 thing per day or however many things we want per day or something.