What helped me a lot is the fact that I have a very short neck. If I had a neck like a stack of dimes, you can bet I couldn't take a good shot. But the fact that I had a short neck and worked on it a lot (as opposed to most fighters who don't work on their neck muscles) definitely helped. I would stand on my head against a wall and move my head back and forth, side to side, for half an hour or so while talking on the phone.