Just in case you haven't discovered it for yourself yet I want to point everyone towards Toby Shelton's relatively new blog "Stuff I Did (when I wasn't doing other Stuff)"
Check out the great examples of storyboards and model sheets on Shelton's blog:
Drawing tips on things like hands (can never have enough of these reference sheets) -
(click any image to enlarge)
The above images are just a small sampling to whet your appetite. Go check out Toby Shelton's blog . Add to your bookmarks. Check back often.