BleepingComputer.com: Overclocking for beginners

Hello all.

New to the site, but I love the content.

I was talking with my friends in class today about gaming systems, and i feel that my performance is lacking

I was wondering if anyone has any guides, or intros to overclocking, so I can learn all i can and try to put it to use.

First of all, here is my system specs, if its not in my sig already.
MOBO: Asus P6X58D Premium
CS: Intel i7 QC
RAM: 8G (4GX2) Corsair DDR3 240 Pin (not sure of the model #)
GC: EVGA GTX260 Superclock
HDD: Seagate Barracuda 750G
OS: Win 7
Cooler Master Nvidia edition case

I am currently only running the box fan, CPU fan, and power supply fan. I might throw the additional fan on the MOBO CPU heatsink, but that thing is so damn loud and its hard to sleep with it on.

Also, im looking to upgrade more RAM soon, to something like 12G or 16G

But anyways, if anyone could point me in the right direction, that would be great!