Any good step-by-step OCing links?

[Boostnjuice]

I am new to the overclocking world and I am not sure how to do it right. Should I use software, or BIOS? and what settings, multiplyers, and voltages should I be using with a D 805 and a D975XBX? and what is the best memory setup to go with?

 

[Bamapits]

I am interested in an OC in general guide.