This is a great post by Terri Windling that talks about creativity, what it means, and ways of fostering it sustainably.
One of the quotes that Terri refers to in her post:
"When in doubt, make a fool of yourself," says Heimel. "There is a microscopically thin line between being brilliantly creative and acting like the most gigantic idiot on earth. So what the hell, leap."
The Drawing Board (blog): Dare to be Foolish