I have been on and of the TP problem during one full year now. And it have been bad, until I came up with the following routine:
What seems like the best way for me to control it is the following techniques:
1)Start with a mental program
Indoor in your living room or whatever place you are, do this routine without the bow and arrow. Close your eyes make your stance and vision the target and go to full draw and hold for ten sec, and lower. Wait for 30 sec and do this again, until you feel relaxed and then do your routine with a controlled release. Remember to do all the correct things like holding the bow in line to you "see" the arrow hitting the spot.
This you should do several times every day to "program" your brain.
2) Find a bow with less pounds 30# range and use this for full draw and holding.
3) Use a blind bale and go to full draw and start to count to 3 and then lower the bow.
After lowering wait for 30 sec. and do it again, but this time count to 4. Do this to you have counted to 10. If you let go at once even at the blind bale, then try with your eye closed.
When you can control holding on the bale then you go for a target or a 3D animal.
4) The routine here is make your stance go to full draw go to your aiming spot and the lower again. If you not manage but release at once then go back to 1)
5) when you manage to full draw go into the spot and lower, then you start to do circles with the arrow at full draw around the spot. Not fast but like coming in at the spot from left make a clockwise circle and lower the bow.
6) when you are controlling no 5) then go to full draw go to your spot cont 1001-1002-1003 an release. Do this several times but count different every time. If you still get the premature release well then go back to start.
when you now can control this, then it is time to pick up your hunting bow and start from scratch.
Another thing I usually do when I feel the TP coming is to take a target and set it up on my garage(concrete) wall and just going to full draw and lower several times before starting my routine. I seems crazy but for me it functioning very well and I do not release at the wall.
+ I every day do the mental shooting in nr. 1).
And an important thing is to relax before every shot.
Remember that this routine need several days for making change and DO NOT everything in one hour!!
This routine works great for me and I do compete in both 3D and target with good results
good luck and straight shooting.
Margly