If your hands and arms are too tight, do the opposite and hinge your wrists quickly. By exaggerating and finding the middle ground, you will improve your swing.
Work on getting a stronger grip. Hold the club more in your fingers, left hand on top, and palms facing down.
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.
Standing on your left foot, while balancing on your right toe when making swings is a great drill to master shots 100 yards in.