When I moved three weeks ago, I switched a couple of bookshelves around and thought more consciously about where I put my books. For instance, I put all the books I haven't read in one place:
The problem is, this bookshelf only contains books I haven't read yet.
In fairness to myself, people gave me maybe 15% of them. And I'm pretty sure one or two are on loan.
Still...no more books until I finish these! (Unless something really interesting comes out.)