Great video analyzing balance by Shawn Clement
I found it real interesting in how the weight of the arms effects balance and how his center of gravity was on the heels at impact. I've gone over 7-17 in Homer Kelley's 'The Golfing Machine' quite a bit, which I believe is a brilliant, yet overlooked part of the book. Clement's teachings are very much in tune with 7-17, in particular of how important it is to keep the weight off the toes in the golf swing and more in the middle of the arches of the feet.
And for thoe who forget about 7-17 of TGM or don't have an idea what I'm talking about, once again is the videos I made on the subject.
One thing I am finding out that helps with balance greatly is to have a S-L-O-W and D-E-L-I-B-E-R-A-T-E startdown of the swing. Having a fast and hurried startdown promotes poor rhythm. And it's very difficult in my mind to have good balance and poor rhythm. They basically tend to go hand-in-hand. But with a better startdown, I've found that my balance usually greatly improves as well.