Personally I'm a person who likes my books to be organised alphabetically by author, but then films I do by genre (so my disney stuff stays together, then my teen movie kinda things, adventure movies etc. etc.). My music on iTunes is sorted alphabetically by artist but the CDs I have are just randomly shoved into a box once I've put them on the computer.
How do you guys organise things? Or do you not? Is it all just a mess.