Learn to teach yourself how to hit. Take from others what is useful and effective, without shoehorning yourself into a blind, dutiful duplication. Replicate nothing without first determining if it works for you. You are one-of-a-kind. What works for someone else may not be appropriate for your needs. Experiment with everything possible – different bats, different balls, different drills, different modes, different styles, different conditions. Keep only the best and discard the rest.
For instance, a favorite Anderson routine utilized 2 separate exercise areas on each side of a 400-yard, open, grass field. One side contained a homemade squat rack loaded with an 800 pound barbell; the other side contained a shoulder press support of his own invention loaded with a 350 pound barbell. Anderson took a golf club and hit a tee shot from one side of the field to the other. After a slow, leisurely, unhurried stroll to the golf ball, he performed a set of 3 to 5 reps at the given exercise. He rested as long as necessary, then hit another tee shot, walked to the other side, and did a set of that exercise. He often performed this type of routine for 5 or 6 hours for a total of 30 or so sets of exercise, each with a world-class poundage.
Be creative, like Anderson. Learn what works for your unique needs and craft an appropriate program. You might set up an open area and hit off a tee, then retrieve the ball in another area containing a wall-swing station, as an example, then perform a soft-toss drill and hit the ball back toward the original tee. Become a strong individual, in terms of designing your own appropriate drills, and become a great hitter.
From October 2010, http://raisingahitter.wordpress.com