Brian Fetherstonhaugh has spent over 35 years in business in global firms, and has seen tens of thousands of career trajectories–from the first steps of entry-level millennials to the long journeys of Fortune 500 CEOs. But he feels most people have the wrong approach to their careers. He says people think about the immediate next step, not the pathway; they treat a career like a sprint, when in fact it is a 40-plus-year marathon. People are more focused on getting promoted on Tuesday than they are about having great choices when it really matters–in their 40s and 50s. Brian has been thinking about careers for decades and lecturing on the topic for the last dozen years at places like Yale, MIT, Harvard, Columbia, McGill and NYU. Here are some of the things he feels you might not be thinking about your career, but should be.