I learned things like: “always introduce a figure from left to right” (the other way around make it seem as if they are leaving or it must be intentional of course), “be good or be poor” and “a good story makes any art sell”.
I was surprised we even learned some marketing strategy and that if things go bad on the economy, artists are one of the first to get hit because art is a luxery.
Oh, and we did art of course…sometimes