I got to spend a lot of time while I was in the military shooting. One thing I learned about was what happens to the body when shooting under stress. Your heart rate increases, your breathing increases and if you are not careful, you can get tunnel vision as well as a lot of other things.
Something we did was PRACTICE, PRACTICE, PRACTICE and PRACTICS SOME MORE, with stress shooting. Nothing will come close to the stress of real battle but you can make the body have some of the same reactions.
When you are practicing, put your bow down and do a few wind sprints and IMEDIATLY pick up your bow and shoot a few arrows quickly. Do this at 10 yards. You will get the idea about how much you will be moving when you shoot. My suggestion is to do this for a while until you see how your body reacts and you give your self time to make the corrections you need to hit your target accurately. When you have mastered the 10 yard line, move back to 20 and repeat. You will get better at controlling your breathing and your heart rate to reduce the amount of movement you see on your site pins.
This is an EXELENT drill for shooting guns as well (that's what we used it for) for defense training. A big bull elk will get your heart pounding and so will a criminal when he has broken into your home at 2am. Keep your self calm and focused and most importantly, aware of your surroundings. That is called situational awareness. Do you see any twigs in the way of your arrow? Where is your child? Are there any cows that are going to bust you? Is there another criminal in the room? Do you see how they can relate?