I think about WHY I'm stinkin' up the joint. And trust me, I've started out double-triple-double in a league round already this year. It's easy for this to happen when I have to be on a 4pm conference call while driving from home to the course, pull clubs from truck and put on shoes while walking to the first tee box.
Tee up and it's anyone's guess WHERE the ball will go. After a crappy tee shot, I'm flustered, blade an 8-iron over the green and have a downhill lie in 3" rough to a green sloping away from me and a six-foot deep bunker 20' past the pin. It can easily go from bad to WORSE from there.
How to make this NOT happen? I try to get there early enough to at least stretch out, chip, putt and maybe even hit a small bucket of balls on the range. And do all this beginning 30-40 minutes prior to my scheduled start time. This way, I'm relaxed, warmed-up and in a better frame of mind to play well.
And sometimes after a nice relaxing pre-round routine, I can STILL go start off double-triple-double. But at least I know there's a par-3 coming up where a hole-in-one is possible ... always the optimist!!!!