If you are bootstrapping your company you might just find something useful on this list.  And if you go through it, at least you will know you have exhausted all the options.  I particularly like:

Overdraw your checking account: Many checking accounts have an insured ceiling, so you can write yourself a “rubber check.” Just plan on using your mattress as a bank for a while, because no one’s going to want to touch you after this sort of stunt.