As a rider, learning how to sit the canter and move with your horse is one thing that will imporove your overall horsemanship. In dressage, we use our seat so much as a primary and fundemental way to communicate well with our horses. Joseph talks through how to prioritize self carriage and balance to learn how to sit with your horse... also remember observe remember and compare. always try to watch good riding so you can mimic it and learn the feeling.
