How to Make a Nocking Point
A nocking point allows you to consistently place your arrow in turn allowing it to consistently be propelled from the same point and with consistent force.
To find your nocking point start by using your brace height gauge (t square) to find half and inch above your arrow shelf, this is where you should start, it will take time to find the ideal nocking point for you.
To create the actual nock, you can use metal, plastic of even some serving. If using string two knots on opposite sides of the string will suffice, burning the edge of the sting away.
Sometimes you may require a second nock, this goes below the arrow, and the purpose is to keep the arrow from sliding down, which happens if the serving has been worn, or the nocks are too large for your string.