Bookshelves too often morph into a jumble of paperbacks, knickknacks, and I'll-get-to-them-one-day paper piles. But with artful arranging and editing, you can turn these eyesores into showcases for things you love. We took a simple $129 IKEA bookshelf, dressed it up with a plywood back, and used it to illustrate three design strategies. Steal these design secrets and turn a basic bookcase into an elegant asset to any room in your house.