Sean Castrina is the founder of The Weekend MBA, a serial entrepreneur, having started more than 20 companies over the last 20 years, and still seeks to launch a new venture annually. He is the author of 4 bestselling business books including 8 Unbreakable Rules for Business Startup Success, The Greatest Entrepreneur in the World, Developing The Entrepreneur Within and World’s Greatest Business Plan. He also hosts The 10 Minute Entrepreneur Podcast. Sean joins Justin to discuss the 8 Unbreakable Rules. (https://seancastrina.com/).