Having recently moved into an apartment with far less built-in lighting, I've come to find that lamps are pretty useful when you want to actually see indoors. Lamps can be pricey, ugly, or both, however, but Bit of Green has a neat solution to this problem: plastic cups and staples.
Basically, you need 250 cups and 600-700 staples to create a cup sphere (as you see pictured above). Once you've managed to put together your 250 cup combo ball you just need a lamp socket, cord, and plug. Stick that in the middle and you've got an awesome lamp. (Just be sure to use a bulb that doesn't get too hot. You are dealing with plastic after all).
Want the full instructions? Go check out this project over on Bit of Green.