Another tip: this helped me a LOT after and instructor helped me with it.
Move your butt EARLY. I move before I even start braking. As I'm rolling off the throttle, I shift my butt over. Then I get on the brakes really hard and in order to stay loose on the bars, all my pressure is against the tank with the inside of my thigh, holding me in place. (essentially I use one of my reference points to move my butt over, which makes me always do it at the right time)
Then, as I trail off the brakes all I have to do is drop my torso since I'm already in position, look through the turn, and get on the throttle
I see a lot of people at the track hopping into their hang-off position right as they are about to make their turn-in input. When you get faster, that shit doesn't fly... you're upsetting the suspension too much.