Batting practice is the time to practice doing what you are going to do in the game and focus on the ingredients of hitting; get prepared to hit, have a plan or a mission in mind when you step in, execute that plan.  Your mission may be to hit the ball the other way, keep your head down on the ball, or simply to see the ball and hit it.  The key is to have something specific in mind when you step in, some clear purpose for going to the plate.