Sweepstakes are an easy way to live frugally. Numerous sweepstakes sites exist on the web, but if you want to search for the best ones, look online for "limit one per day", "instant win" or "winner will be notified".
This is a great idea. I entered the Scott Instant Win contest and I won a photo album. It's really cool--they actually print your photos in a bound book. You design the pages yourself. Value is $29.99 and I got it for free--and on my first try! I've been trying to win again, but, alas--it seems it was only beginner's luck.