In a number of Andrew's demonstrations recently, he has mentioned the use of a pricking cradle. In our classes we show you how to get by without one however using one could be beneficial in helping with your job flow.
The pricking cradle mentioned here is a V shaped holder for you to put your sections into. You then line up your hole punching template and punch your holes with an awl. This will get you holes that are on the exact fold of the section and not on an angle.
Instructions for making your own from card is
HERE. If you do make one, please share a picture on your profile so we can see them!