A cross between DWR's Sapien Shelves and Jim Rosenau's reinvented book sculptures, this amusing how-to from Instructables member dorxincandeland is a fun, cheap way to add some levitating vertical storage space to your walls.
The creator suggests using this method to create book shelves, but you could also make bedside or display shelves -- anything you'd place on a shelf could just as well be placed on an old book. Take a page from Jim Rosenau and come up with some topical pairings!
Be sure to check out the comments. Dorxincandeland's readers have suggested some useful modifications.