Anyone can be an entrepreneur, but not just anyone can be an entrepreneur and an angel investor for other start-up companies. To become an angel investor, one must first become successful, and being a successful entrepreneur seems like a difficult task — a task accomplished by the Bay Area's own Biz Stone, co-founder of Twitter. Stone not only helped launch a platform that's facilitated a 140-character-at-a-time communications revolution — not to mention Blogger, Medium, and other startups — he's also written a book. Appropriately yet somewhat lengthily titled Things a Little Bird Told Me: Confessions of the Creative Mind, the memoir-slash-vague-advice-book "inspired and informed" Stephen Colbert of The Colbert Report, and Arianna Huffington claims to have found it "moving, funny." At Stone's upcoming talk, he'll explain how his creative style has helped him achieve success in tech, and presumably he'll answer questions as well. For Bay Area entrepreneurs who someday want to become entrepreneur-slash-investors, this is their opportunity to hear advice straight from the mouth of one of GQ's 2009 "Nerds of the Year."