I found a great drill that has helped me to make sure I have the correct posture when I am addressing the golf ball.  This drill will help you like it has helped me.

The drill is called the Hip Hinge Drill. 

Golf Exercise - Hip Hinge Drill

Hip Hinge Drill

There is an excellent video that demonstrates how to correctly do this drill over at Better Golf with Fitness.

Check out the Hip Hinge Drill and get in to the correct address position to hammer the golf ball.