5-part (and counting) series on drawing the head/face by the awesome Stan Prokopenko:
Head Part 1 (Any Angle): [link]
Head Part 2 (Front View): [link]
Head Part 3 (Side View): [link]
Head Part 4 (Extreme Angle): [link]
Head Part 5 (Eyes): [link]
Sorry if everybody's already seen these. I just stumbled across them and they're awesome. Not every day a "how to draw" video makes you laugh...