One-Day Education: What would you want to learn about?

With so much education out there, I am wondering what people REALLY want to learn about. As editor of Stone World, I am involved in planning the StonExpo seminar program, and (http://maplered.com) we also host our own day-long Stone Fabrication Workshops throughout the year. (Gratitutious plug: www.Stone (http://g603.net) world.com/fabworkshops).

My queston to everyone is this: If you had to go to a one-day class, what are the three things you would like to learn about most?

Thanks!