^+1 on that. go to a club or shop where there are good shooters. pros or the old timers. for the last 2 years i have been shooting with guys that shoot all the nationals and stuff like that and i cant tell you how much better i have gotten. i know more about bow mechanics and tuning, which has greatly increased my ability to fine tune and adjust when needed. another big one is shooting 3d's. i think there is no better practice then shooting one shot at one target adn making it count. its just like hunting. all of this has helped me progress so mcuh in the last 2 years and i have been shooting for 7or 8 years now. i am more confident right now than i have ever been.
and just remember when hunting, if you are doubting the shot, dont take it b/c the last thing you want to do is wound an animal. just take your time and practice and who knows, you may be shooting your 40's solid by season. good luck
Derek