A typical problem for somebody that tends to pull the ball is the fact that they position the ball in their stance way too far forward so that when they are setting up their shoulders are actually looking to the left. During this swing, by the time the clubhead arrives at the ball it is swinging around to the left, thereby producing that pull we are trying to avoid. What you would like to do is have the ball positioned far enough back in your stance so that you contact the ball while the club is still moving slightly on the inside of the target line or down the target line. By moving the ball back this will help eliminate that pull. A good drill to do that is what I call the “Variable Ball Position Drill.” What I would like for you to do is set a club on the ground to tell you where your target line is and take your normal set up with a ball on the tee. From there position a second tee about three inches behind the ball and a little to the inside of the line the ball is on, then position another tee another three inches further back and a little further inside and then finally a fourth tee on that same path and a little further back. Then move the ball back to the backmost tee and take your set up and practice hitting shots off the back tee. In order to hit that ball your club will be moving well to the right of the target line and you will start training your swing to go more inside out. As you can make contact there move the ball up to the next tee and practice making shots with the ball in that position until you can make contact with the ball there. Then move the ball up to the next tee and continue doing the same thing. What will happen is that at one of those tees the ball will start at or just slightly to the right of the target line and you will know that is the correct ball position for you to eliminate that outside in swing and that pull shot.