One of my dressage teachers alway said "Rise and fall with the leg on the
wall..." (in other words the outside leg). When the outside shoulder goes
forward, you should be "up." Another thing I do, when I'm conditioning or
competing is, instead of sitting a beat to change diagonals, I stand a
beat. I figure it's a little less pounding on my horse's back. I
learned to to it when I was riding a very green, super-sensitive
Thoroughbred. It takes a little practice, and I still grab some mane
sometimes, but I think my horses appreciate it!