A former Columbia University football player and coach, Campbell went on to work with and mentor with some of the biggest names in tech, including Steve Jobs, Jeff Bezos, Larry Page, and Eric Schmidt.

One thing they often talk about is how having a mentor really changed their life and made them who they are today. Add to ...

Take Oprah Winfrey, for example. Her mentor was the acclaimed poet and author Maya Angelou. Or look at Mark Zuckerberg, who had Apple co-founder Steve Jobs as his mentor. Both of the above ...

Benioff recalled the last gift Steve Jobs ever gave him ... He knew it was something his long-time friend and mentor would want to sink in. It would be some sort of message.