"One day I could draw a fortuneteller; the next, an astronaut. I went from sultans to superheroes, robots to rabbits. I felt liberated. I refused to get bogged down or fuss over the drawings. I spent no more than an hour with any one cartoon, and many took far less time than that. For the first two weeks I was feeling my oats. I already had a half-dozen keepers and was confident there were plenty more winners on the way. It was at this point that I started dreaming of actually selling a cartoon to The New Yorker..."
A great little article — with lots of cartoons — from James Sturm.
(Here, buy some of his books.)