I love love love process drawings and sketches but now that a lot of our drawing is done directly into the computer you don't see a lot of it around. Here's a paper process drawing of the Quik Bunny that shows how to break up his pieces so that he can be drawn and animated into a banner ad.

Mike Owens often uses different colored lines for storyboards, animatics, or to distinguish bits like this. A good trick..especially if you're not using a lot of detail otherwise.

Here's the final art in context (banner ad demo)

http://www.punyentertainment.com/clients/MRM/index.html