This is a great question. I think that you have to do the following:
1) Demonstrate the move perfectly under ideal conditions.
2) Break the move down to five or six steps (doesnt have to be exactly this amount, but generally it ends up being around 5 or 6 IMO).
3) Demonstrate the move again perfectly.
4) Let the students practice the move and when you see a common error or a place to insert a detail, do so, but only after they have been practicing it a while.
I hate when people over-elaborate, like Im doing with the post. ;)