If you're getting to the course early enough to stretch and hit a few balls, it's probably in your head.
The truth of the matter is that most of the time I stood on that first tee, I had no idea what to expect. And that's not a bad thing. I remember a round many years ago when I birdied the first three holes. Standing on that fourth tee, I was thinking, "Let's not throw all of this away." Suddenly tension crept in. I gripped the club a little tighter. The OB stakes on the left suddenly stood out in my mind. "Do not hit it there!"
I successfully avoided hitting the ball OB. But I hit the ball so far right that there was no way in hell I would ever find it. We call those AMF swings. Adios, Muther Fucker.
So I stood on the 5th tee at level par for the round. As soon as it came, it left. And suddenly I stopped giving a shit and made a bunch of pars and a few bogeys and shot my average.
The mind... that 6 inch space between our ears.
A friend always joked, "There are two longest walks a man will ever make: one is to the execution chamber, and the other is to the first tee."
Get rid of your expectations, amigo.
Adios!