This will sound crazy: When you only focus on your core skillset, your growth slows. Instead, you need to add what Jonathan Goodman calls "leapfrog skills" — a list of five other skills (including writing and human psychology) that will accelerate your growth. Goodman is a hugely successful serial entrepreneur and author of the new book The Obvious Choice. In this episode, he explains how to find and learn your leapfrog skills.