• Don't grip your bat at the very end; leave, say, an inch or two. Also, leave at least an inch or more space between your hands; that gives you balance and control of your bat and also keep your hands from interfering with each other during your swing.
• Take position at the plate, especially against right-hand pictures, back of the plate; and against a man with a real curve, you can stay on back line of the batting box. Now try to hit to right-center.
• Don't slug at full speed; learn to meet them firmly and you will be surprised at the results.
• Now to hit as I ask, to right-center or center, you stand away from the plate the distance you can see with mind's eye that you can hit the ball that curves on inside corner, to center. This distance away from the plate will allow you to hit the outside ball to right. I n other words, protect the plate both on inside pitches and outside. 
• Remember, the plate is the pitcher's objective and he has to come to it. I use "back of plate" expression to mean towards the catcher, away from the plate to denote distance from the plate towards the outside of the box. Now, use a slightly closed stance and keep a little more weight on your front foot than back. That gives you balance and you won't pull you away from curves. You are always in position to give maximum drive.
• Keep your left elbow cocked on level with your hand or even higher. Never let your elbow down below the hands and keep your hands always well away from your body -keep pushing them out, even with your body or back.
• Keep your back leg straight. Of course if you put your weight more on the leg , then the back leg will be straight.
• If high fastballs inside really bother you: crouch over from waist and pass them up. In other words don't bite. In crouching you make the pitcher throw lower, which forces him away from the position that bothers you. But I think with the instructions I have given you will hit them wherever they pitch.                         
• Don't pull a curveball from a right-hander. The ball is revolving away from you. Hit with the revolution and to right field.
• Against a speedy left-hander, don't pull. Use some stance I have given you, and when he throws you his curve knock him down with it or you will naturally pull it as the ball is breaking in to you. But against left-hander of fair speed, move up in the box, also closer to the plate, and pull this style of pitching.