As you can see we all miss, it's part of the experience. If you hit everytime you shoot, well, then it would be to easy.
For me and my nerves, I usually let a few deer go by first before taking a shot. You will find that just having deer around you will settle you down over time. This has to do with the adrenaline in your body wearing off/decreasing. After a while you will start to regain your composure and then you should be able to make that shot you dream of.
Best of luck to you!!!!