Instructions
To get your cheat codes, first go to the most popular gamer forums. True gamers are who know the codes, and you can always find someone willing to share what they know...and who better to know than the experts?
Check the magazine rack at any nearby bookstore. Cheat Code Central Magazine and Cheat Codes Magazine are two excellent choices, with lots of ways around the most difficult games. While you're at the bookstore, you can also look up the various books on cheat codes - be forewarned, though, they aren't as up to date, so they won't help with the newer games. One great book is Cheat Code Overload. It's one of the few cheat codes books that is published quarterly to stay current.
The next step to getting that cheat code is to use a search engine. Enter the name of the game and the game console to see what codes are out there, and if one will work for you. Google or Yahoo should be able to discover something that you could utilize to advance your game.
If none of these steps gets you closer to the cheat codes you need, it's up to you to get your question out there. Go to the most popular gaming sites and start a thread about what you want. Alternatively, visit Yahoo! Answers and post your question there. Someone out there knows something, and if it isn't on the web anywhere, you've got to make it known. Put it out there and someone is bound to help.