I think these shelves are just the cheeriness I need.
Above: Shelves from discarded TVs, created by flickr user Choose Your Shoes.
Below: These shelves by Thomas Wold have been posted on various blogs, but there's a good reason for that, they're just plain awesome. Read his blog for other great products, as well as a brief tutorial on the processes he uses.
I think Louise Nevelson would approve.