I'm like Little Cheif, I fall apart after the shot.
For starters it takes time. You just need to do it and get used to it. The biggest thing is having confidence. In both you and your equipment. Plenty of practice and KNOWING you can make that shot when you need to does a lot for your nerves. Actually killing a few is big boost as well.
Take your time, don't hurry and know that you can get the job done when need be.
But hey, if your not getting excited you should look for a new hobby

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Paul