I keep all of my to-do lists in a drawer in the kitchen. That's the most convenient place for me to find them.
Just yesterday I found the one I wrote March 3rd, 2005. See? How handy is that? Bonus: I had more than half of the things on that list finished and immediately crossed them off.
It was a good day.

Just kidding.
Seriously though, I try to only keep as much stuff around as I have space for. For example, I have very limited cupboard space in my kitchen. If I see something at the store I want, I think about where I'll put it. If there's not going to be space for it in a cabinet, I don't buy it.
When it comes to my scrapbooking and rubber stamping stuff though, I have run out of space in my s.b. room. So I'm emptying the small bedroom across the hall and I'm going to build some shelves in there to store extra stuff. Because....... (say it with me!) "When it comes to crafts, you can never have too much stuff!"
Barb