It sounds corny, but I've begun to become a fan of taking five minutes a day (or before shooting) and closing my eyes and visualizing my shooting. This means a mental image of the target, focusing on the spot, imagining the proper back tension, anchor, and release and "seeing" the arrow hit. It takes practice to visualize properly, but it has really increased my shooting skills. Along with this I'm a fan of variety. Closing your eyes and shooting at a bare bale to focus on form, shooting targets, 3D courses, throwing a pop bottle and shooting a judo at it from different distances. Giving yourself different challenges prepares your mind to cope with the stresses faced while hunting. The walk out the door, nock, and shoot one arrow tactic is a great way to get focused for hunting. Good luck!