hunter good luck to you next week. As far as staying calm... just take a nice deep breath and make it like target practice. You're going to have nerves of some sort, but you have to learn how to stabilize them enough to make the shot. Make sure you've done enough practicing where it's second nature to you and then just perform the shot you know you can make. Get nervous afterwards.
I can't wait for Saturday either. Made the mistake of glassing my land from afar yesterday morning. Watched about a 130" 10 pointer walk right towards one of my stands.