Fixing a golfer's hook is usually easier than fixing a slice. This is generally because better players fight the hook, while beginning golfers typically fight the slice. As a golfer gets better they learn how to correct their slice by straightening out their ball flight and maybe even getting a slight draw. However, this slight draw can very easily turn into a duck hook, so the golfer must learn to hit a more 'neutral' ball without as much hook spin. Fortunately, this is a fairly easy fix.
Weaken the grip
Rotate the hands counter-clockwise on the grip so that the 'V's' formed by the thumb and forefingers point less to the right shoulder and more to the chin. Weakening the grip in this fashion makes it more difficult to rotate the clubhead through the contact area, thereby decreasing the likelihood of the toe leading the heel when the clubface comes into contact with the ball (which causes a hook). Be careful with this however, because the slightest change in hand position on the grip will cause dramatic changes in ball flight (so, just move them a tiny bit at first).
Lighten right-hand grip pressure
When the golfer grips the club too tight with their right hand, the tendency is to over-rotate the clubhead through contact, as the right side of the body will sort of 'take over' the swing. The right hand and arm are the 'power producers' in the golf swing and the left hand and arm are the 'control producers'; so there needs to be a balance between the two. Since most right handed golfers are actually right handed, they must be careful and try not to power the right side through too forcefully. Make the main 'pressure points' the pinky, ring finger, and middle finger of the left hand, and decrease pressure in the forefinger and thumb of the right hand. A great drill for people who fight the hook is to hit balls with the thumb and forefinger of the right hand completely off of the grip.
Open the stance
A closed stance encourages an 'inside to outside the target line' swing path, which produces draws and hooks due to counter-clockwise spin imparted on the ball. An open stance encourages an 'outside to inside the target line swing path, which produces fades and slices due to clockwise spin imparted on the ball. So, rather than 'closing your body to the target' (right foot pulled back), 'open yourself up to the target' (left foot pulled back). This will also encourage a higher ball flight, as a clubface that is more 'open' has more loft, and the golfer will also swing on a steeper plane. Again, don't do anything too different, just take a slightly more open stance and notice what changes this produces.
Alter the release of the clubhead
Instead of rotating the clubhead through contact, have the feeling of 'holding on' for a fraction longer. As the clubhead comes down towards the ball, have the feeling of keeping the clubface square for a foot or so after contact (rather than rotating the toe past the heel). This method is known as the 'hammer to nail' release, as the golfer should have the feeling that they are contacting the head of a nail with the clubhead at contact, then continuing to drive the nail through the ball and on past it before allowing the clubhead to rotate. This swing thought/ method also encourages getting more lag in the swing and consequently hitting the ball further. Assure that the clubhead is releasing down the target line after contact and not to the left of it.
Try these tips to cure your hook. If you are still having trouble, go see your local pro.
