So I don't want to give away her whole class, you'll just have to sign up yourselves to get all the nuggets, but this one was my favorite. We were asked to do a painting in one hour using only 20 strokes. Yep that's right. So you really had to think about what color you wanted to mix and scoop up a big bunch so you could cover the space in just one stroke. So for example the sky is one stroke - as long as you don't lift your brush off the canvas it's one stroke.
Try it some time. Very fun.