e2180, Abit ip-35e

I've never overclocked, but when I purchased this PC, I knew that it
would be good to overclock. Also has an excellent CPU fan.

Intel e2180
Abit IP-35e
4GB DDR2-680 (according to BIOS)
CPU Core Voltage says 1.325 OV
CPU VTT Voltage says 1.200v

Can anyone suggest what to put in for values?
I'm only interested in going up to about 3.0GHz or less.
I've read very little, and I don't understand what people mean when they
say, "stock" or "up a notch". So plain English please.

Or a website that explains this. I've googled overclocking, but there's
too much information out there, when all I should have to do is change a
few settings.

Thanks