Do you have any lines of credit currently available?

Here are a few ideas:
Craigslist - List anything you really don't need.
Collect your change & cash it in.
Any recent purchases that you could return?
Have a small Yard Sale?
Recycle scrap metal & cans.
Temp Agency - See if you can get a few hours of work doing anything.
Check for paid Medical Tests or Studies
Pawn Shop
Donate Blood
Donate Sperm