I had a wonderful day last week at a Stick Painting one day workshop. We had a model, plain paper and a dowel broken in half and we were off to the races! You had to work very quickly to get the outline down in a few strokes.
You hold the stick near the end so you get quick lines. The idea is not to work like a drawing but a sketch. You then can take a brush and wet the ink to make shadows, etc.
It is a great way to free up your work.