I thought I would post some of the most useful websites I frequent:

www.xbox.com: The official Microsoft website for all things Xbox, including games, hardware, Xbox Live, support, your profile, forums, and more.

www.gamespot.com/xbox360: This website. Very comprehensive. But reviewers are stingy with their game scores and they over-value innovation, often overlooking how much fun a game may be. Read for the details and judge for yourself. Also, game reviews used to be posted very close to a game release. Now they tend to take an exorbitantly long time.

xbox360.ign.com: Another good game-centric website, but the reviewers here tend to be more forgiving. Still read for the details, but they are more likely to give out an Editor's choice more often, and tend to be quicker on the draw with their reviews.

www.gamerankings.com/xbox360: I believe this is where GameSpot collects it's Critic scores from. Useful to see what industry averages are for any game.

www.teamxbox.com: Another source, but I don't visit here often. Can provide a balanced perspective with the other sites.

www.gametrailers.com: Good place to view game trailers, if you don't find them on the other sites.

www.gamefaqs.com: A great place to find game guides and walk-throughs, should you run into a tough spot.

www.xbox360achievements.org: The BEST place for lists of achievements and explanations on how to get them.

en.wikipedia.org/wiki/List_of_Xbox_games_compatible_with_Xbox_360: Wikipedia list of all the Xbox original games that will run on the Xbox 360.

en.wikipedia.org/wiki/List_of_Xbox_360_System_Link_games: Wikipedia list of all the Xbox 360 games that support System Link game-play.

But please don't use cheat codes. That's just... ah... cheating. Play the game to unlock things. Get help if you need it, but don't take the cheesy way out. Besides, you don't get achievements if you use cheat codes. Just say no.