Attended my first Dr Sketchy and had the honor and pleasure of sketching ladies from Slutwalk Singapore. Click on the link, because you know, say no to stereotypes and rape.
I enjoy contour drawing as it really trains observation. Go straight to the lines --- hit-or-miss; figuration becomes abstraction. Albeit, the danger of observational contour drawing is an impaired imagination and a predisposition to lose sight or forget forms.
Van Gogh once said, "A line a day." An advice which we can all heed.