It’s a classic Catch-22—with a careerist twist. When facing big decisions early in your career, you don’t have tons of real-world experience to draw upon. And by the time you’ve actually racked up a decent supply of workplace wisdom, you may feel like you no longer need career advice. If only career tracks came with fast-forward and rewind buttons. (Or a blue police call box, for those who like to time travel in style.) Who...