I like many have struggled and wrestled in my head with how to handle the moment of the shot and what prevents me from proper execution. These are the salient points I have come up with over 38 years behind the string.
1. First and foremost remember, the shot is either gonna happen or its not, when that window opens rushing the shot because you think you don't have any time before they are gone will never help you make a good shot. Best to regret that you have to let down because you didnt have enough time than to miss when you actually had 3-5 more seconds to do it right.
2. Don't be overly concerned about the deer seeing you draw and getting picked off. Its gonna happen sometimes, part of the game, but you cant let that get in your head. If they do look up and see you, continue your sequence instead of stopping mid draw or letting down. You can often get a shot off while they are still trying to figure out what you are.
3. Focus on your spot early, and follow it. When the spot is in range, take your shot, as above if you are overly concerned with what the deer is thinking you will either psyche yourself out of taking the shot or rush it.
I've missed more than I care to remember, but if I don't Hyperintend, and just stay in the moment, the shot does come together.
Lastly, don't give up. Others miss too, not just you. They learned to hit because they kept swinging.