color. by. binding.

This will likely sound like a pretty dorky suggestion, but it's easy (as far as decorating goes), so give it a try first: organize your books by color. While this might not make books the easiest to find, it makes a statement. And best of all? It will change the look of your room FOR FREE! Try it on just one shelf first - I promise you'll be surprised at how cluttered your others books seem in comparison.