I've been working hard on coming up with a solution for my "overthinking" when I'm shooting, especially in competition. Part of the problem is that I've been working on my form in much greater detail than I used to, and I find it difficult to stop working hard on my form even in a tournament. Also, I've been so focused on form that I've neglected my shot routine, which had withered away to almost nothing until I started bringing it back after my last lesson. The mantra I use as a scaffolding for my shot routine is definitely helping.
But what I desperately need is a way to let Self 2 / Right Brain mode to take charge. I know I can't shut off L-mode, but I know that you can manipulate it into taking a back seat, either by giving the brain a task that L-mode can't or won't do (Betty Edwards), or by giving it something to do unrelated to archery. I know what it feels like when I seem to slip into a daydream and shoot on autopilot, but I don't know how to bring it about.
When I think about it, and read Edwards or Galwey, I come up with any number of good ideas which then prove to be difficult to impossible to execute when I'm actually shooting.
But I think I just need to come up with a visualization or a song that I can keep bringing my mind back to, the way you do in meditation.
Last night I set myself the task of coming up with something overnight, while asleep. All that happened was that I had a bad dream about my bow case. This is the small bow case, and the upper half is warped, making it difficult to close. I would never fly with it again, because the slightest bump would cause the latches to pop open, but in my dream I was flying with it, and looking at it gaping open (the latches had been bumped) and thinking, didn't I swear never to fly with this bow case again? But then I noticed that it had also gotten bashed somehow, and had a big dent in one corner, but this had fixed the warp in the upper half and it was now straight.
You could look for some hidden meaning here. Or, you could sigh and say, just another anxiety dream.