Nothing beats a half day work in a classical figure drawing class. It makes you feel like an idiot, handicapped in every aspect, turning your otherwise gentle nature into one of a bickering and frustrated individual.
Well, once you had a good dose of that joyous experience, you start to realize how little you know about anatomy and you start to view every little accomplishment as a super huge leap towards understanding the human form.
So, while I get my courage up to show my face again at one of these life drawing sessions, I will list a little on-line guide to some sites, that can help in understanding anatomy.
Mars by William A. Bouguereau
I find that once, I understand what's going on under the skin, I tend to get a better sense of what to look out for when drawing or painting.
This site is just fun to play around with...