Leave room for magic. Here’s a secret: The biggest laugh in my TEDx Talk came from an unscripted moment of improv. It wasn’t in my notes. It wasn’t planned.

Ten years ago, I gave a TEDx Talk on entrepreneurship, fear, and compared climbing the Seven Summits to growing a successful start-up. I rehearsed it over 100 times.

In a newly released TEDx talk, poker pro Maria Ho discusses how to create an optimal decision-making process. The California native gave the talk at UC San Diego, her alma mater. Ho has $4.7 ...