The following are steps on how to knock your opponent out. (It is not recommended to fight or use these techniques).....

First off, you atleast need to know how to throw a punch or at the least be able to move around. If you can't do either, you might as well just run.

There's really three ways to knock someone out.

One has two variations:

1. A strike to the jaw in which you cause the mandible (lower jaw) to slide left or right. There is a cranial nerve just behind the mandible. The second the nerve is tapped by the movement of the bone, it sends a shock to the brain to shut off all non-autonomic activity.  Instant K.O.

2. Any strike that causes the brain to slam against the inside of the skull. This is actually trauma to the upper brain stem. The same principle as the cranial nerve. Instant K.O.

3a. Cutting off the oxygen supply. A pec choke or an improper rear naked choke or any of the strangle holds in which the windpipe (the difference from 3b below) is traumatized or blocked.

3b. Cutting off the blood supply such as in a rear naked choke. Yes, the rear naked choke. Many people are actually doing it wrong. The proper technique squeezes the jugular.

http://www.imaginismstudios.com/journalism/images/knockout.jpg

I am Eastside_Dave, and good fight, good night!