dogtown's tutorial is pretty good, the only thing i wouldn't do is set so many keyframes, it tends to get shaky that way, especially for inexperienced filmers.
for long lens, just find out what looks best, don't always use the same mm, use your environment, zoom in/out, pan to or away from the skater, i think that's what the guys from ptc do alot, at least jerr, and so do i anyways.