The majority of employees—a full 80%—who quit their jobs during the Great Resignation regret the decision. That’s according to a survey by the HR and payroll services provider Paychex. In fact, more than two-thirds attempted to get hired back. While many left because they didn’t want to spend their lives in a job they didn’t like, regret could be due to not understanding how to find a job that would be fulfilling.

“For the last 20 or so years, we have told employees, rather than the old way—where you join an organization and we tell you how to develop your path—you have the flexibility and freedom to decide how you want to make the dots line up and create a career of your own that’s authentic to you,” says Ethan Bernstein, Harvard Business School professor and coauthor of Job Moves: 9 Steps for Making Progress in Your Career. “This is fabulous and completely overwhelming, because we’ve told them almost nothing about how to do that.”

One of the ways you design a career that’s authentic to you is determining how you interact with energy drivers and energy drainers. You could define energy drivers as those tasks you do that excite you and make you feel focused. Energy drainers are the things you do that make you feel bored and restless. However, Bernstein recommends looking at energy drivers and drainers in context of your career, which means looking at your résumé.