Dorie Clark, a marketing strategy consultant, answers a burning question: how do people make money off of what they know? She outlines the options for experts who want to monetize their knowledge. Clark explains, using herself and other successful solopreneurs as examples, how to earn revenue from public speaking, podcasting, e-books, and online courses. She also goes over what to charge and when to get an assistant. Clark teaches at Duke University’s Fuqua School of Business and is the author of the new book “Entrepreneurial You.”