Maybe you should just spend some time watching the deer for a while without taking a shot. The more you get used to having deer around you the less buck fever you will have.

I get the fever too but I've practiced so much during the summer that it's almost automatic even if I'm nervous.

Also, do you have a 3d target? I would take a 3d target into the woods and set it up near your treestand where you think the deer are going to be. Practice with your hunting clothes on and with your broadheads. (Hell leave it there for a decoy if you want to). While you practice, mentally rehearse as though it were a real deer. Make the first shot count.

Speaking of broadheads.... I'm sure you've done this....Have you actually sighted in your bow with the broadheads you are hunting with? Do they fly exactly like your fieldpoints?

If you're broadheads are dead on than it's just mental. Take deep breaths and pick your spot and follow through. You'll get em....