If you are having Hard Time Fixing Strong Grip

To fix your hooks, you need to change your grip. The grip that is too strong will cause closed clubface at impact. However, as you know, it's hard to change your habit. Some golfers tell me they changed their grip, but I don't see any changes. If you comfortable with your grip after changing it to weaker grip, you are not really changing it. It has to feel awkward at first. That's why most golfers hate changing their grips. I know a golfer who was fighting hooks. We changed his big hook to a gentle draw.

 

Here is how we did it. I asked him to grip club like usual. But before gripping it, I told him to rotate his club little to the right and grip it. This is like how we grip a sand wedge for a bunker shot. For bunker shots, you need to open your clubface first and then grip the club. By opening his club a little before gripping it, he was able to weaken his grip. When hitting ball with his new grip, I asked him to point his clun face directly at the target at address. He felt strange at first but soon started to hit a little draw. You may want to experiment how much you rotate your face open before gripping it. The ball flight will tell you how much you should rotate your club face.

 

Reference: http://www.golfsamurai.net/fault-fix/fixing-strong-grip.htm