I've been trying to do a figure study in charcoal or pencil at least five times a week to improve my drawing and painting abilities. These studies are under three hours. (It's sort of like going to the gym to lift weights when I'd rather do something cardio) I am using casts from Michaelangelo and Greek sculptures. The contour studies in particular, show me where I need improvement. I'm trying not to use mass, which is how I prefer to draw, and limiting personal expression. My focus for these studies is accurate form and getting that more quickly.
17"x12" ($35.) charcoal on toned paper