Have you ever tried picking up recyclables and turning them in for cash ? bottles, cans, scrap metal, etc..
How about getting a booth at a flea market for a few weekends to sell some stockpile ?
I also know someone who helps people/businesses organize. In addition to her fee she gets to keep their throw aways which she then sells for extra cash.
And if you're desperate..... there are places that will buy your plasma, eggs, etc.....