I'm at home on break right now. I live 10 minutes away from work so I usually come home, play guitar for a half an hour then head back. They keep me pretty busy at work, but I still run out of things to do so I know how fast a boring day at work goes by. I tend to thrive at www.wordiq.com as it's an online encyclopedia and it's got a database with just about everything in it. I say take this time to develop skills... and get paid for it. Are you in an office out of peoples' view? If so then you can get up and move around or do some pushups or something. Granted it might look a bit conspicuous at the end of the day when you walk out of the office sweating, but what can you do? If they want you to work, they should give you work. Right?

Also, I'm just curious. What are the qualifications of a job that doesn't give you any work? How hard is it to get in that doorway?