Is it a jittery jerk, or a full on chainsaw pull start yank? Either way, it all about calming your nerves. Another tip you can try with a large target and a calm voiced helper is this. Stand about 5 yards away from your target. Take aim and draw back, anchor, and sight in to the center of the target. Close your eyes and have your helper line you up as to not miss the target when you release. Wait for your helper to say "ok" and send your arrow. As you become more comfortable and not so twitchy on the trigger, move back a bit and repeat the process but with your eyes open. Still wait for your helper to give you the "ok" to release, but you hold for 10 seconds or so on your small dot. Try it and good luck to you.
Whitetail Strategies Guide Service
Fred Scott Owner/Head Guide