MUP said:
I pretty much know if I'm gonna shoot, so I very quickly start looking for a shooting lane, and really just try to concentrate on the kill zone of the animal....then just squeeze the shot off as it all comes together.
This.
Once I've made the decision to shoot, I immediate start looking for shooting lanes (I'm almost always hunting in thick, brushy areas), and watching to see which ones the deer may walk through. Once I've identified the shooting lane I'm going to use, concentrating on finding "the spot" to aim for on the deer, depending on shot angle, and purposefully NOT looking at a buck's antlers (if it is a buck I'm going to shoot). Then following the deer through the scope--both eyes open--into the shooting lane, and finally telling myself a smooth squeeze of the trigger instead of jerking the trigger out of excitement.
And because we're talking about mental rituals, the two that are most deeply ingrained into my mind and are part of making a shot are: memorizing where the deer was standing when I shot, and where was the last place I saw the deer if it runs out of sight.