I've been going through things of mine to sell, and have found a ton of old games, gaming systems, toys, etc that hold some value. So I set up a ChipIn with sales and raffles of the items, because eBay has some pretty high fees that I don't want to deal with. I also take cheap art commissions and am preparing to sell all my fine gold/sterling silver jewelry I got as gifts('cause hey, I'll never wear it, I might as well make use of it) in order to make a little extra cash because I don't currently have a stable job.
Go through all your old stuff and see what you can part with, you'll be surprised at what you might find. If you have an ability, offer services such as art commissions, essay corrections, subject tutoring, lawn services, child/pet care, etc. The money from odd jobs and sales can really add up.