rearranging, 8.17

When fall is near, I start rearranging and organizing.I've taken to my bookshelves in an attempt to clean and tidy things up (I've acquired quite a few this summer thrown about, not yet finding their place since they've been...well, being read). Ever since I saw some set in a magazine where all the books were organized by color and size some handful of years ago or so, that's just how I've been organizing them.I used to do it by author. And in college, it was organized somewhat autobiographically so I could remember what I was reading when.How do you organize your bookage in shelf?