How to breed creativity?

After reading Howard Gardener's 5 Minds and Ken Robinson's books on creativity, I am puzzled with one idea. How can we enhance our creativity.  I believe everyone is creative, but many people on see in black & white, they follow strictly to the rules or to the minute detail, while failing to miss the big picture. Why is this?  Robinson has argued time and time again, that Schools kill creativity. Is this true?  From my own personal experience, I would say yes.  Within the US School system, schools created creativity as long as it fit into the standardized box.  Creativity does not belong in a box.