O.C Intel E8400 on a P5KC

Hey Guyz,

I havent had much experiance with overclocking. Just been doing a bit of research on it recently, because i just built a new system consisting of;

Intel Core 2 Duo E8400
Asus P5KC
4GB DDR2 800Mhz RAM
500GB Samsung HDD
XpertVision 9600GT O.C Sonic Edition (HDMI)
Arctic Cooler Pro 7 Heatsink/Fan
Samsung DVD-RW Drive
A+ Xclio Twin Engine Full Tower Case (Two 250mm Fans)
12cm Fan installed at the back of case just behind heatsink

I wanted to know what is the best way i can overclock my cpu to from 3.0ghz to 4.0ghz running stable, with the specs listed above.

Thankz In Advance!
DonShak22