This should be your first stop.
Core2 Overclocking Guide (generic guide based on an Asus motherboard)http://www.tomshardware.co.uk/forum/259899-11-core-overclocking-guide
Next stop should be a guide for your particular motherboard.
Except for the memory, this one is not bad:http://www.youtube.com/watch?v=tNFWG3cgOaM
Set the memory to Linked. You gain little by trying to overclock your memory and it can increase instability.
Keep your CPU voltage under 1.50 volts and your load temps under 70 C.