I feel your pain... but I am actually learning them for the first time. First year hunting, first year bowhunting...
Lesson 1) Calm down before shooting. Opening day (first time hunting) I had a doe at 20 yards. It is all a blur... I pulled back, aimed and released. Never saw the arrow... I did hit it and after tracking for 6 hours, with some very experienced trackers, came to the conclusion it was a brisket shot and doe survived.
Lesson 2) Don't call deer closer when they are looking at you. Had a doe at 30 yards. Wanted to call it in closer, so I did. It was staring right at me and I did some doe bleats. It wasn't there much longer than that.
Lesson 3) Keep bow away from objects when releasing. Had a buck at 15 yards in back of me from tree stand. Pulled back, was relaxed, had pin right on vitals, focused on deer, released... as string released the riser unflexed, hit top/back of tree stand pushing bow up. Arrow flew over back of deer.
Lesson 4) Practice with all your clothing/gear on. Had a doe broadside at 20 yards. Was wearing a face mask because it was cold. Pulled back and could not feel string on nose or kisser button. Had to let down because I don't want to miss again. Doe took off.
Well, every time I go out I seem to learn a new lesson. One of these days I would like to learn a lesson about grilling venison.... someday.