How to Draw bodies and torsos

Check out this video to learn how to draw bodies and torsos either digitally or the old fashioned way. I start with the spine and head and ribs and pelvis, then make the arms and legs and do it all very roughly. Then I make a body out of that. On paper I let it stay really rough and then I can trace over the good lines on a clean sheet. On computer it's easier by just using layers. I haven't had any formal training ( obviously ) so if you are good at figure drawing and could offer advice or tips, they'd be welcome. :)

Tools:

Painter IX

Camtasia Studio

Wacom Tablet