Free Entry Sweepstakes
The newest one at Gamestop is Fuel Your Game, where you can win a Halo 3 Console Prize Pack which includes:
Halo 3 Limited Edition 360 console
Halo 3 Wireless Headset
Halo faceplate
Halo Xbox LIVE subscription card
Halo 3 poster
2 Halo 3 wireless controllers
Halo 3 legendary edition
AX200 Panasonic Home Theater Projector
And More!
30 runner ups will receive a mini-fridge full of Dew!
Now that's a sweet deal. Personally I enter as many as I can
Now, 1up.com also has some nice contests going. http://www.1up.com/do/feature?cId=3139329
One of them is where you can win a 360 and a Dell 37" HDTV monitor.
Now normally I wouldn't tell people because that decreases MY chances, but I'm feeling generous. And if I don't win, at least I know a friend of mine may have won.