My philosophy is to simplify things as much as possible. Help players make one or two positive adjustments in their hitting techniques.
Most players routinely make basic mistakes.
Focus on the fundamentals. I also see too many players starting with their hands too high, extending the time it takes to get to the ball. Another common mistake is taking a long stride. A shorter stride will help with balance and weight balance is a fundamental key to hitting success. I stress compact swings as a way of having success and building confidence.