A lot of good advice, even your own bowhntr. I know from personal experience that it is possible enough to be so focused and not distracted that you can shoot any spot you want. It happened to me when I was a kid and I've not let myself get that way since (with a weapon). A little of it is good. I don't dwell on anything but the target and tell myself that I have all the time in the world.

If that doesn't work I've heard that if you visualize the target naked it helps. Or something like that