I think one has to consider what type of shooting they will be doing. For instance, how repeatable a grip can be based on shooting a few shots such as preparing for bowhunting or many many shots such as competetive target shooting is two different things.

For my, I've found that a semi-high wrist that matches the shape of my grip works best. As I draw I let the deepest part of the grip settle into the web between my thumb and forefinger, then place my grip angle created by my thumb and forefinger into the grooves in my grip. From their, I don't grip a thing, back tension is holding the bow into the web between my hand, and I let my fingers do something similar to what PMantle stated above.

Find a comfortable grip that matches your bows grip and repeat it, and you're on your way to consistency...