If you are having trouble getting your hips out of the way and swinging over the top, this drill will help. Practice using different clubs.
Stand on your right foot, use your left toe to balance, and make a swing. This drill will help you feel how to put pressure into the ground and not jump off your right side.
The Split Grip Drill is excellent to practice if you struggle with the Lever System. Working on this will help with distance and control.
Standing on your left foot, while balancing on your right toe when making swings is a great drill to master shots 100 yards in.