If you would like to see how I incorporated the turk's head knot into a a dog leash project, please visit my blog.
The tools that you need are very basic. You will need a woodburning tool, a mandrel (I used a pen) which is used to form the knot and a length of paracord.
Take the top strand and thread it under the top wrap and have it pass over the bottom wrap. Now gently tighten the knot so that it looks even.
This is the basic Turk's head knot. If you want to add more wraps, take your loose ends and "chase" the wrapped strands that you have made.