Richard Sheridan, CEO of Menlo Innovations, says it took him years to learn what really mattered at work and how to create that kind of workplace culture. As a company leader today, he works hard to make sure both his job — and the jobs of his employees — are joyful. That doesn't mean they are happy 100% of the time, he argues, but that they feel fulfilled by always putting the customer first. Sheridan is the author of "Chief Joy Officer: How Great Leaders Elevate Human Energy and Eliminate Fear."