I want to be organized, really I do

Okay, this question goes out to my people, the ones who have oodles and oodles of CDs. Just how the hell do you keep them organized? I tried the alphabetical thing but then everything gets all farked up when you buy a new CD that doesn't start with Z. So any suggestions? I'm tired of not knowing where my CDs are. For the record, I've got 3 CD notebooks. A CD tree for cases or something is not an option.