I just stumbled on the blog site of "Ren and Stimpy" creator John Kricfalusi, where he writes about cartoon art from the early days on, as well as giving valuable instruction on drawing and cartooning basics. His blog is a great read, even if you are not an artist, cartoon or otherwise. He also reveals many of the inspirations that jump-started his ideas and pet projects in his life. The above image comes from an article he posted on animation artist Art Lozzi of Hanna Barbera. I always liked Yogi's stylized backgrounds since I was a kid. Especially when he was running from the Ranger and the scenery kept repeating round and round.
John K's blog: http://johnkstuff.blogspot.com/
The Lozzi page: http://johnkstuff.blogspot.com/2006/10/color-theory-good-color-without-lot-of.html