All the above is sound advice. My first bout with TP reared its ugly head a week before the '96 IBO worlds. It got so bad I could not make it to full draw without releasing. Through the last 19 yrs here is what Ive learned if any form of TP is present.
-Develop a pre-shot/shot/follow through routine. Write it down recite it in your head as you're doing it. This is your mental checklist for the following.
-Start every practice session blind bale. Regardless of the type of release
-If you can't execute a proper shot blind bale don't even attempt a normal shot. This may take weeks, be patient.
-Blind bale is not just shooting with your eyes closed at back stop. If you deviate from the checklist start over. Develop the mental image of the perfect sight picture while blind bale and concentrate on breaking the perfect shot.
-Don't rush anything. If it's not happening, walk away. If you only get 10 good shots off in a day, so be it. Better that they're the 10 best shots you've ever executed.
-When you feel your ready to head out to your tgt limit your session. 10, 20 30 arrows. Whatever doesn't cause the process to degenerate. If it does go back to blind.
-When you are in front of an actual tgt the mental checklist/shot routine cannot lapse.
-Don't even worry about your impacts ( that's what brought you to this point in the first place) you're focus is the shot execution and whether or not you let an arrow fly prematurely or off your aiming spot because your mind didn't allow your pin to get there.
-Don't allow yourself to accept a bad shot if it's starts happening walk away.
-If a shot cycle is not developing let down. Why let go off an arrow that wasn't going to be executed properly, it's counter productive to the process. (I can remember being on our range one day for an hr and releasing maybe 2-3 shots)
-Put yourself on a progression schedule of sorts. Week 1 10 good shots a day, week 2 20, etc.
end these sessions going back to the bale for 10 shots or so whether the practice session went well or not.
To echo some of the above you don't need to move to BT. But I would recommend it. You do however have to make some type of change. A simple increase in trigger tension is enough.
I am a big fan of BT. I've shot them in some form since I was 13. You name it I've tried it. Currently I have 3-4 zenith archery BT releases all with clickers. And all have different depths from a quick .003" to somewhere around .012-.015" they are all the same size and color. I put them in a belt pouch and blindly select a new one at every shot. This keeps me honest and there is no way to anticipate how quickly the shot will break.
This is just my experience and YMMV, but you have to be proactive, be honest with yourself, and have discipline. Best of luck to you, it's a hard row to hoe!
