I take the advice of an Olympic archery coach (and traditional hunter). I've made a "String Bow" training aid. It is just a loop of string (about the diameter of parachute cord)made to fit your draw length. Warm up your mind and shooting muscles with the String Bow. Whenever your actual shot isn't feeling right (maybe evidenced by less than stellar results) get the String Bow out and review your form.
To make the String Bow:
1. Start wtih 90" piece of string (about 1/8" dia
2. Fold it in half.
3. With bow hand hold the string 8-10" below fold
4. Place draw fingers in the fold.
5. Raise bow hand and draw hand
6. Draw the string through your bow hand to anchor
7. Pinch the string in bow hand to mark spot
8. Tie an overhand knot at this point
9. You've made a loop that is your draw length
10. Practice the shot, especially follow through
When you can imagine the string bow is your bow and the bow is the string bow, you are there. In my 45 years of shooting this is the best advice I've ever been given.
For more information I recommend two DVDs.
1. Beyond NASP --
www.nasparchery.comm 2. Stricklands Traditional Archery--www.stricklandsarchery.comm
Hang in there. My "signature" on these posts is my mantra when it comes to shooting a bow. You've shot long enough that the physical side of archery has taken a back seat to the mental aspects a long, long time ago.