First thing. Grip, Aim, and Setup are still where it all begins and ends for the best players.

Second thing of note. How you move determines the rate at which the club moves from up to down in your golf swing. This is called "transition" and is one of the major contributors to the good and/or bad in a golf swing. This move is very important to how well you can control the golf club through the shot as well. Are you still working on your short-game?

Last but never least. At the top level or even when you begin to break par on a regular basis you will find that the things that occupy your mind and vision have changed quite dramatically since you last thought that you knew what you're doing.