This Cartoon Life:Take a look at Quentin

Another favourite of mine is Quentin Blake widley acknowledged as a master illustrator. His drawings have some much life, the same sort of life you find in the rough, loose spontaneous sketches we all enjoy looking at. I believe he manages to retain much of the energy in his work through his methods. So instead of me trying to explain it all I will leave it to the man himself.
Click the links below to be whisked off to the studio of Mr Blake.

http://www.quentinblake.com/illustrators/action_10minutes.html

http://www.quentinblake.com/illustrators/action_jackanory.html