RE: Tips to improve your steadiness..
The only thing I've found that helps me is doing this at every shooting sesion.
1) Stand 10 yards from a good target.
2) Shoot 20 arrows concentrating on keeping your bow arm still and up after the shot. I count to 3 after I release the arrow before I move the bow.
3) 20 arrows on proper release
4) 20 arrows on back tension
5) 20 arrows on picking and focusing on the smallest spot.
6) 20 on Consistant anchor
7) 20 on pushing the bow out while drawing back
8) 20 on all the above
It gets a little teadious but it has helped me a lot.