Dry firing from the blind.
I make sure I, or whoever is with me, dry fires a few times from position after we get in the blind. It helps sort out their position and get them set. I coach the heck out of them about cheekweld, natural point of aim, breaking the trigger at the respiratory pause, using proper eye relief, proper trigger technique, et.
I have kids, new folks, (and myself) dry fire at deer we AREN'T going to shoot just to get the groove on. Good mental and physical practice. Plus it's not uncommon that folks will not know how their guns work, so while we are at it we check the safety and trigger function. By the time deer show up that we want to shoot everything is squared away.
I was in on killing 14 deer last year, plus some hogs. I shot the buck I took offhand, but had dry-fired at some other deer in the same field before he walked over the crown. I'm still kicking myself for shooting him. Should have held off a year. My blood was just up, following the does in and watching them and a little buck.
Yesterday at the range I was practicing bullseye pistol with a box, scope, and Les Baer .45 with the correct targets at 25 and 50. A father and son had targets and knockdowns scattered all over the range and were shooting in the pistol pit, the 200 and 500 rifle berm, 100 yard berm plus some spinner .22 targets. They had a Walther 9mm, a 44 revolver, a .22 rifle semi, and some cheaply scoped Savage bolt in 308. They came up to see what I was doing and we chatted for a bit then I walked down to to look at this scope that wouldn't zero. They had it turned up to 48 power, so you couldn't see through it. I backed it down and they let me shoot at 100. The kid was watching as I shot at a DPS blue man target he had up at 100. I sat down and dry fired a little off the bench. They didn't know you could cock the rifle by lifting and dropping the bolt and had NEVER seen anyone check a safety to see if it worked. (God knows what they would think if they ever watched a bolt gun being shot in rapid fire.) I started shooting and was calling my shots in the head. The kid was watching the target with a very bad 128 power spotting scope and was being polite- he thought I was missing- no holes in the head that he could see. I was shooting at the head of the little target schematic up in the corner. The rifle and his handloads shot well but he needed to move his scope forward in the mounts about two inches to give himself a chance at the correct eye relief.
I'm rambling but the thing I see a lot is folks with reasonable equipment, who like shooting a LOT, but don't have access to information to sort out what they are doing. I've had some experienced hunters in the tower that never watched deer or game carefully, never looked at the wind or mirage floating by and don't seem to know much about their rifles or ammo. I wouldn't trust their zeros or their shooting. It's all simple stuff, but maybe everything comes at them a little too fast.
That's why I think most everyone should shoot some kind of formal competition. It sorts out what is really happening, usually in the presence of people who are able to help. I've got my rifles lined up for deer next season, but every one of them will have a couple range sessions with the ammo I am going to hunt with before I take them hunting. And I will have a firm zero at 100 and know how they shoot. I shot eight deer with seven different rifles last year and guided the rest. Just bought a sporterized Krag off Gunbroker that is the current favorite. CMP Garand supposed to be in tomorrow to go with the others. Just about quit on scoped rifles for deer and having more fun than ever.