Cubdriver has it nailed. The other thing I really stress with students is that you should be anticipating what your pivotal altitude should be rather than just looking at the pylon and making the appropriate correction. The "follow the pylon with your yoke" is okay for small corrections, but you should not rely on that as your only cue to change your altitude. Downwind = higher GS = higher PA. Upwind = lower GS = lower PA.