T.S. Eliot was clearly onto something when he asked, “If you aren’t in over your head, how do you know how tall you are?” The very act of stepping outside of your comfort zone is critical to your success and well-being.

Our brains are wired such that it’s difficult to take action until we feel at least some stress and discomfort. In fact, performance peaks when we’re well out of our comfort zone. If you’re too comfortable your performance suffers from ...