Sell some things on ebay or craigslist, do chores, mow some lawns, help out elderly neighboor around the house, wash cars.
mowing lawns(summer), shoveling snow(winter), babysitting for maybe a week? Cleaning someone's house for about a week?
Buy a scratch-off lotto ticket :) who knows, you might get lucky
i got a quick 50 for bby sitting =]
Yard sale!!!