Any kind of moonlighting job that requires flexibility. Direct sales, like Tupperware, Amway, and many others are an option. You leave a slim catalog at a workplace in your area, then return to see if anyone wants to buy anything. For example, I know you are a man, but house cleaning, or yard care, is not a bad job for a once a week source of cash. I have baked desserts for restaurants - this is something I do late at night and then delivery is no problem. If you are handy fixing bikes, autos, electrical systems or plumbing this is also a knowledge worth its weight in gold. Let people know that you are available and with time the word will get out. Good luck!