I think the most important thing about accurate shooting is to get your muscle memory chiseled into your body by shooting a lot, concentrating on your form and on every shot. Start out 5 yards from the target, close your eyes and concentrating on your grip, fingers on the string, pulling to a solid anchor and releasing. Do this 100 times until it is a natural feel. Then move back to 10 yards but this time open your eyes(safety first) but follow the above path. When you can hit your target consistantly move back 5 yards more and continue.
Shoot every day as much as you comfortably can(50-100 shots). If you don't really feel like shooting or can't concentrate, put is all down and come back later. Bad habits are harder to break than new habits are to learn. By doing this and by making your shooting style consistent you can eventually shoot consistently without thinking. Now, you can concentrate on your accuracy, you can concentrate on where the arrow WILL go, where it will hit that hair over the kill zone.
When I'm hunting, many times I don't remember the shot. I often remember putting tension on the string then seeing the arrow in the target but not the actual shot. I let my brain deal with all of that peripheral junk and just concentrate on where the arrow will go.