The golf swing is such a finicky thing. One day you may be striping the ball as pure as Adam Scott and the very next day you may be $hanking it like a rank beginner. WTF? Since the golf swing requires so much precision, the reason is often a breakdown of swing fundamentals. Even an infinitesimally small change can throw a monkey wrench into a golfer's swing. The fact that these changes are frequently unnoticed by the afflicted golfer in turn leads to disbelief and frustration.
I think that the most important, but also the most overlooked fundamental is the grip. I've already posted Butch Harmon's proper grip technique, but I recently came across another excellent video on the topic below. It covers some important elements that Butch does not. After viewing and fully understanding both of these videos, there's no excuse for not gripping the golf club correctly every time!
