Matt,
The only thing you can do is learn to function under that feeling. The more you experience it, the more you will adjust to it and how to keep a cool head. It's not even the physical aspect as much as the mental aspect many times that throws us off. Once you get that first one under your belt, often times its MUCH easier. And the "intimacy" of deer hunting makes it that much more emotional to many of us, that's why we do it.