I received an e-mail from someone I really respect as a friend, a martial artist, and a mentor. He advised me to teach less material at seminars. The e-mail was sparse, he is one of those people who often teaches with a single word, but he seemed to imply that trying to cover it all every time would hurt my longevity (business-wise, I assume) and it made it hard to describe what the seminar was about.
So I'm kicking it out to get some more thoughts. My gut feeling is that I don't teach...