I'm learning a lot (and reinforcing a lot!) from some Crossfit videos, in particular Blauer.  He says, amongst other things, 'Don't confuse the trademark with the truth'.  What does this mean?  There's some enormously talented athletes out there, just because they do something and they're successful, does not mean that what they're doing is the best or most appropriate thing.

And, even better, as a coach : Do not show your students what you can do or brag about it, show them what THEY can do!