It is very important that we remember that golf is a game to be played and we are to have fun doing it.  Therefore, I always love using drills and games to make practicing more efficient and more enjoyable.
This drill is called the Step Change in Direction but most will recognize it as a take off of the Happy Gilmore movie.  It is imperative that the body transition in the proper order to maximize efficiency in your swing.  If the body is not being efficient, you will have power leakages.

This inefficiency is easiest to spot in those swings that come a little over the top as you can see with your eyes parts of the upper body firing before the lower body.  Once the shoulders, arms or hand have begun the transition sequence, you can not catch up.  Maximum power generation comes from the pelvis/lower body beginning the transition towards the target.  This should be followed by the chest/upper body, then arms, hands and the club head at the end.

This drill helps ensure your weight shift toward the target is occurring in the correct order.  It is also the most fun drill to work on as…hitting the ball far is Fun!