Some of the most innovative ideas and products in the world come from interdisciplinary collaborations. So what if you could become a one-stop interdisciplinary shop for bright, outside-the-box ideas? According to marketing expert Dorie Clark, that's what happens naturally when you start to build a side project or immerse yourself in a new hobby—even if it's just a few hours per week. Devoting yourself to learning how to build an app, run an e-commerce site, sell to clients, or create an artisan product expands your skills portfolio and makes you more valuable to your employer—plus the additional revenue streams will afford you some income cushioning should something happen to your full-time job (touch wood). Not only does your gusto show initiative, but it could allow you to solve problems from a perspective that is unique among your colleagues. Beefing up your skills is an entrepreneurial tactic that can transform your career and income potential. Case in point, Clark shares the story of how one nurse rose up the ranks like lightning to become the communications director at a major New York City hospital. Make your hobbies pay off and become professionally independent. Dorie Clark's new book is Entrepreneurial You: Monetize Your Expertise, Create Multiple Income Streams, and Thrive.