But here's the thing. It. Doesn't. Help.
It doesn't help to get mad at yourself, or jealous of the other guy's shot, or talk about quitting the game. You just have to move onto the next shot. Practice. Practice. Practice. Take a lesson if you have to from a Pro. Practice some more.
Think you can transfer this advice to other things? Writing maybe?
It's about having a positive attitude. Finding (or making) the time to practice your craft. Take a class. Write some more. Read.
I know it's sometimes hard not to get pissed off. And we all slip. I've slammed the club on the ground too, and cursed myself, my ability to focus, my swing. (My dedication to my writing, my inability to string two words together sometimes, etc...) But you've got to get back out there and practice.
Now, off to hit some balls. Or, um, revise my manuscript.