Absolutely terrific post.

The only thing I'd add is that if you want to get REALLY good at learning how to judge yardage, this practice is best done with no bow in your hand. Take dedicated time to learn this aspect of the sport and you will get better than the people your shooting against. It's not fun and it's boring, but I can guarantee 99.9% of the guys out there are not doing it and this gives you a significant advantage. The best 3D shooters I know of, guys that have been succesful at the world championship level in semipro and pro classes are spending as much time on this part of the game as they are actually shooting, it's that important.