Susan Cain's TED talk on The Power of Introverts is thought provoking, honest and funny. It's become so well received that she even made the NY Times. She highlights the belief that creativity comes from being gregarious rather than "solo flights of thought." I'm often seen as an extrovert but that's actually not the whole story. I consider myself an extroverted introvert (what Cain calls ambiverts). As an ambivert I often need a mixture of crowds and alone time to bring my creativity to fruition. To wit, Cain claims that solitude is often a crucial ingredient to creativity.
Even if you're an extravert, a little quiet time can likely help your creativity and productivity. Let's curl up and watch shall we?