Just thought I would throw this in for fun. Yes I know about warm up balls prior to playing, and chances are ya did use up your best shots than! Lol can do the the same by just swinging a club with a weight. I used to be very good and gave pointers as i worked part time at a golf store, and played in many tournaments, but I never take it seriously now. It is a hoot to watch these young 250 lbs muscle men walk up to a drive and swing so hard they could start a propeller. Than it goes maybe 250 yards at best and they beat their chest.
I have seen females including my 5'4 115 lb niece walk up to a shot swing easy and consistent and hit it about 240.
On the course too many people watch the pros. I laugh and say after some one takes two of their best swings prior to hitting the ball, ya wasted those. Just like looking at a mark while behind a ball for aim. Most don't know why but looks good! After their practice swings, they metamorphis into this hulk where their veins are popping out of their forehead and it doesn't look anything like their practice. Try to walk up to the shot, address the ball, and swing like a easy going practice. you will play much better.
Let me know if you tried it...