I know this site is in no shortage of video game enthusiasts, so below is a link that many may find very useful and may increase your gaming experience significantly.
Some of these tips have been covered in other posts and tutorials already on AO, but this is more of an all in one guide.
System Optimization Guide for Gamers
I'd like to also point out a tutorial written by tyger_claw to help you troubleshoot gaming problems. By the way... GREAT JOB ON THAT TUTORIAL!
Hope you gamers enjoy!
BTW: I didn't post this in the tutorials forum because I didn't want to take credit for someone else's work. If anyone feels thats where this should be... PM me and I can move it.