Stan Prokopenko just keeps impressing me!

Seriously, if you guys haven’t watched these videos yet, you need to. I’ve seen a marked improvement in my own work since I started watching (and re-watching) these.

Previous videos in the series can be found here:
Head Part 1 (Any Angle): http://www.youtube.com/watch?v=1EPNYWeEf1U
Head Part 2 (Front View): http://www.youtube.com/watch?v=z4ZLkyTuX_w
Head Part 3 (Side View): http://www.youtube.com/watch?v=yS6R2l8t8wo
Head Part 4 (Extreme Angle): http://www.youtube.com/watch?v=PgK90TpV5fA