If you want to get a quick 1000 achievement points for Xbox 360, this one takes about 5 minutes. Rent or borrow a copy of Avatar: The Last Air Bender - The Burning Earth. Start a new game and in the opening fight scene, run to the second fence post from the bottom on the far left hand side of the screen. Turn and face the enemies and press the B button repeatedly. You will quickly attain the first achievement before a cut scene. After the cut scene, return to your spot by the fence post and once again fight off the enemies by repeatedly pressing the B button. Keep doing this until all of the achievements have been unlocked. Here's a video of how to do it:
http://www.youtube.com/watch?v=4XkIzyVwNRg