Courtesy Universal Pictures

Best-selling author Marshall Karp used to work in advertising. But then he realized he didn’t like what he was doing because the original architect was a lousy planner.

“This rut that you’re stuck in, this life that you’re trapped in, who planned it?” he writes on Quora. “Not you. Most of us form our life’s plans shortly after high school. I was pushing 40 and still living the dream of some teenage kid.”

So he decided to switch careers and become a screenwriter and author. “My Act Two was conceived, written, produced, and directed by an adult. And I’m grateful for the insight that convinced him to take on the job.”

Sage advice.