**8) Are you steady? **
Try this simple test. Shine a laser or flashlight beam on a wall and hold it perfectly still. You can't. Now consider the fact that when the quarry presents itself, you might suffer from buck or bull fever. Or you might be out of breath from climbing or moving fast to get a clear shot. In each case, your firearm will be unsteady if you try an off-hand shot. Use a rest, any rest, whether it's a bipod affixed to your rifle, portable shooting sticks or a natural object such as a rock, log or fencepost. Even a hat jammed into a bush will help steady the shot. At the least, get into a kneeling or sitting position or use your sling.