Emily Esfahani Smith, author of “The Power of Meaning,” has long studied how people find fulfillment. As the ongoing pandemic causes many of us to rethink how and why we do our jobs, she offers advice on how to find more enjoyment and engagement, avoid burnout, reset ambitions, and, if necessary, change paths. One key is to define - or redefine - your purpose as it relates to work, and Smith explains how to do that wherever you are in your career.