dont shoot with the cam facing the sun. (try your best anyways)
low angles and high angles look best.
filming in front of the rider looks sick.
point the camera ahead of the rider (rule of thirds)
the longer the pole the smoother the shots.
dont be afraid to get close.
make your shots dynamic.(always move the camera)
Thats about all i can think of for now.
just study edits. Travlin circus is good to watch if your interesting in filming rails.