Originally Posted by godisdead

At least borrow a movie. Search Wikipedia. Search Google. Clean up the house. Exercise (pushups). Read. Cook something. Take a bath. Call someone. Go out. Go for a walk. Draw a picture. Write your memoirs. Play computer games. Go swimming. Learn juggling. Learn quantum field theory. Think about your life. Meditate. ...

You get the idea. You should probably start with:

Make a list of all the things someone could possibly do. If you come up with an option you'd like, you stop your brainstorming session and just do it.