I've interviewed around 500 people. I can trace all my best and worst hires back to this single interview question.

Eli Rubel is a serial entrepreneur and the CEO of Profit Labs.

Meraki Photo & Film/Meraki Photo & Film

• CEO Eli Rubel has founded multiple companies and said he's conducted around 500 interviews.
• Rubel shares his interview strategy and how he landed on "what gives you energy and what takes it away?"
• He said the way candidates respond is almost always directly related to what he sees in performance.

This as-told-to essay is based on a conversation with Eli Rubel...