No organization that’s entirely closed – or entirely open – can scale as successfully as an organization that combines both. Yes, organizations that are open invite a bit of chaos – but that chaos breeds innovation. Knowing which aspects of your organization should be open and which should be closed will set you on a path to rapid scale. No one knows this better than Joi Ito. He has spent his career championing radically open systems, from Creative Commons to cyber currency. Now as Director of the famed MIT Media Lab, he’s focused on facilitating open conversations so we can keep pace with the shifting challenges we face in our companies, institutions, and societies. Cameo appearance: Megan Smith (former U.S. Chief Technology Officer).

Starting a business? You’re also starting a community. Caterina Fake, co-founder of Flickr and an early investor in everything from Etsy to Kickstarter, says it’s vital to establish guidelines for your community early on — because the tone you set is the tone you’re going to keep.