Practice as much as you can before hunting from a stand. I shoot from my deck standing on top of a picnic table. I have a climbing stand and the platform is small, I am almost always standing with my feet together. I guess it is not proper technique, but shooting from a small platform does not allow me to have my feet at shoulders width. Also make sure you bend at the waist when shooting down; don’t just move your arm down. As for where you want to aim, think about were the arrow is going to come out of the deer opposed to where is going to go in…that helps me.