Years into her Amazon career, Kristi Coulter found herself coasting in an easy role that played to her strengths. Photo courtesy of Kristi Coulter; Getty Images; Alyssa Powell/BIKristi Coulter was working at Amazon when she found herself in an unexpectedly easy role.She enjoyed less stress and a better work-life balance in the job, but felt guilty about coasting.Coasting gave her the chance to be confident, effective, and a better employee, she realized.One bright April afternoon several years ago, I strolled to my desk at Amazon in Seattle, freshly showered and sipping the smoothie I'd grabbed after my four-mile run.I greeted my officemate and re-reviewed the agenda for my next meeting.