^i agree completely. First of all, you need to practice shooting, period. if you dont have a range finder, yo need to set the target at one point and move around and shoot it at different unknown distances to develop a sense of range. Second of all, if you have missed 10 or more deer in 3 years, you need to stop and think, what am i doing wrong. your situation sounds dangerous and UNETHICAL. it is perfectly acceptable to miss or mess up a shot on occasion, and it happens to us all. i missed a chip shot last year with my hoyt at like 22 yards. it was just poor judgement and shot angle. but numerous, full misses, you have had to wound at least a couple of those deer a miss isnt a marginal error, it is a complete flop. If you are well prepared and shooting a good tuned bow, misses, should be rare. It should be highly more likely to make a marginal error in judgement i.e., a bad shot, or poorly placed shot.
If i were you i would limit myself to only certain shots, and take them as they come. you never have to shoot b/c the deer might not do what you want it to do. that is poor judgment and not good on your part as a hunter. Lastly i would say, read the sticky that matt/pa wrote on the buck fever thing. it is very good and maybe that will help you focus and calm your self more. Good luck to you, and hopefully you can take some of our advice and construct it into your success as a hunter.
Derek