Always have your elbows sitting on your legs to connect them to this anchor (or on the wheel pan, whichever is most comfortable).
This follows on from my first tip. Your body is there to provide a steady anchor against the spinning clay. Always have your elbows sitting on your legs to connect them to this anchor (or on the wheel pan, whichever is most comfortable). If your arms are floating out away from your body you'll find the clay is going to be moving your hands around, whereas we need it to be the other way around - your hands moving the clay.