Most golfers will develop flaws in their swing from time to time. Beginners are quite likely to develop a slice in the early stages of their game. Once they learn to correct this problem, they are quite likely to overcompensate and develop a hook. While this problem is usually not as a bad as a slice, it is best to correct the problem right away.
Make sure your club head is square to the ball at impact. One of the leading causes of the hook is that your right hand is turned a bit too much toward your body, and that forces the club head to be close on impact. If the club head is turned to the left (closed), then your shot will go to the left. This is called a hook.
Come directly over the top of the ball when you begin your downswing. You can hook the ball with an inside-out swing (left to right) and outside in swing (right to left) or a pull (swing goes to the left). If you come down directly over the top, you have a better chance of squaring your club face to the ball at impact.
Slow down your swing. A mis-timed swing will often result in an errant shot. If you come through the ball too fast with your hands, you will likely turn your right wrist over at impact and the ball will go right to left.
Check your stance. If you notice you have been hooking the ball, your tendency will be to close your stance and aim more to the right. This seems logical, but it will only get you to hit an even bigger hook. Make sure your shoulder is facing the target, and don't overcompensate.
Loosen your grip a little. Golfers who hold the club too tightly tend to hook the ball because their right hand has such a strong grip on the club. Your swing should be driven by your hips, and your hands should follow along. Your right hand is no more important to your swing (most of the time) than your left. If you feel like your right hand is doing most of the work, then you will most likely hook the golf ball.
Tips & Warnings
Keep the club head straight when you make contact with the ball. Keep your head down.