Todd,
Another way to approach it is to re-define winning.
I've talked to many competition shooters (mostly compound, but that is irrelevant for this discussion) and when they are running into TP problems in competition, they have to take a step back and define winning as shooting a certain percentage of good shots in competition. They admit that they can't win when they are suffering from TP, so they step back and do what they have to to get control of it.
One excellent pro archer, George Ryals admits that he entered the pro ranks long before he was ready and developed TP from trying to win against the best archers around. Fortunately he got help from a good coach. One of his milestones was when he was able to shoot 50% good shots at a tournement. It took him several more years to get to the first tournement where he shot 100% without jerking the shot. He went on to win several national & international tournements.
The point is that TP can't be cured 100% overnight, especially when you can't duplicate the conditions that trigger it.
Figure our your ratio of good shots to bad during competition. Then the next time you compete set a goal to try to improve that by a realistic margin. Don't even worry about where the arrow lands. Not every good shot is an X. You know what a good shot is. Just keep track of how many you are able to execute.
One of the fastest ways to avoid winning archery is to focus on "winning". Even at the highest levels you have to focus on executing good shots. String enough good shots together and you have a winning score. To do that you have to focus on shot execution.
It's sort of the old "How do you eat an elephant?" question. Obviously, one bite at a time. A good archery shot is built one step at a time. Jay's techniques are excellent and WILL work, but they are not instant cures.
If you focus only on executing good shots and ignore the score, you will shoot winning scores much sooner.
Todd, this is not just my advice. It comes from George, Al Henderson, Terry Wunderle, Len Cardinale and several other great coaches and archers. I've suffered from exactly the same problem. I haven't beat it yet. Until this year, shoulder and elbow injuries have kept me from practicing enough. I'm finally up to 80 to 100 arrows a day. Usually I stop from mental exaustion, not physical. Focusing on execution is difficult and mentally tiring, but I see a huge improvement in my shooting. Fortunately, like most exercises, it gets easier the more I do it.
To win, focus on execution, not score.
Hope this helps,
Allen