I have worked on Stationary Head, flying wedges and right forearm takeaway which has helped my swing immensely. Another component I have worked on recently is foot action and I think this has corrected several faults at the same time.
By ensuring the right heel moves only when it is "pulled off" the ground and no more than required, I find that my swing is much quieter in that it doesn't have the excessive body motion I was prone to before. I was taught to "lift" the right heel off the ground to transfer weight, and I believe this method was the main reason my swing wasn't as effecient as it could be.
With this change, I am aware of the contact my right heel has with the ground when I make impact with the ball.