Golfers are likely plagued by it from the first day they picked up a club. They have probably taken lessons to correct it, but it always seems to come back. Of course, we are referring to the dreaded slice. What's insidious about it is that the more you try to compensate for hitting it to the right (assuming you are right-handed), you only hit the ball farther to the right. There's a way to cure it, once and for all.
Difficulty: Moderately Challenging
Close the face of your club because most slices are caused by its being open. For right-handers, the proper way to swing a club includes allowing the right hand to cross over the left one just before and during the point of impact. That motion will close the clubface and thus eliminate the major cause of a slice. In addition, if you do this properly, you will create speed at the bottom of your swing and the result will be greater distance.
Keep your head slightly behind the ball throughout your entire golf swing. For example, if you move your head ahead of the ball before impact, your hands will not fully rotate and you will leave your clubface open. Make a concerted effort to do this, and before long you will begin hitting the ball straighter.
Close your stance at address. If you are aiming to the left of your target to compensate for your slice, in effect you are opening your stance, which will encourage a slice because your shoulders and hands do not have time to completely rotate if you stand that way. Instead, address the ball with your right foot slightly behind your left, then take your normal swing. In most cases, you will see an improvement in the flight of the ball.
Correct your outside-in swing if that is the cause of your slice. A easy way to do this is to raise the club so it is parallel with the ground, then take the club back to the top, making note of the plane of your swing. Then begin your downswing by making sure that the club's plane is inside that of your backswing. If you do this correctly, you will cure your outside-in swing and you will complete it with your right shoulder above your left.
Practice makes perfect. Try these adjustments on the driving range until they become routine. Most likely, you will begin hitting the ball better on the range, but there is no guarantee that you will on the golf course, at first.