Here is something that I read a while back. Aim at your target while standing. Then close your eyes and count to 5 slowly. Now open your eyes you should still be aimed at the same spot. If you're not you need to adjust your feet one way or the other depending on which way your gun was aiming. This is called your comfort zone.You need to keep doing this untill it becomes secound nature. I've done this and it has helped me. Of course like eveything else you need breathe, focus, etc... The biggest thing that will help is to practice, practice, practice.