In the movie "The Patriot" Mel Gibson tells his sons to aim small/hit small. Basically try to hit a spot on the deer and not just the front 1/4th. I practice holding my gun (scoped) on several photos of deer torn out of magazines I pin on my wall. Try to choose different sizes of photos to imitate deer at different ranges. I also like to choose photos of deer in heavy cover. At first your scope will generally make a lazy circle over the target. But soon you'll be able to control the float and can make smaller and smaller wobbles. I dont' dry fire for about 15 minutes then I take a spent shell and practice firing while changing to different photos to make it fun on my "lease in a room". Work out with shoulder exercises and shrugs with weights for better steadiness.