Like a lot of things, golf is as much a mental game as it is a physical game. Distractions, noises, an itch on the back of your leg...all these things can effect your game as much as twisting your arm in your back swing.
Try doing a bit of yoga breathing. Close your eyes. Take a deep breath. Swing when you're ready. Follow through after you hit the ball.
If you're a writer, try doing the same thing if you get stuck on a scene. Amazing how a little deep breathing can help.
Also--there's still time to enter to win Jackie Davies THE LEMONADE WAR--just click on my facebook link (and like) and comment on the post for the contest -- click here.