I'm new to OCing

hey i'm fairly new to building computers...i built my second last year.
I do not know how to OC, its hard to figure out especially with the mobo i have...I'm no genius when it comes to hardware...plz help. I would like to oc the cpu for best performance.

these are my system specs:

Gigabyte knnxp pro
Amd 64 3200+ clawhammer core (754)
2x corsair XMS 512mb pc3200
2x WD raptors 36gigs
Seagate barracuda 120 gig
hitachi deskstar 160 gig
evga geforce 5700fx 128mb (ordered a gigabyte 6800 ultra)
and just got an x-connect 500w psu