JACK DORSEY

Jack Dorsey (TW: @JACK) is the co-founder and CEO of Twitter, the founder and CEO of Square, and a board member of The Walt Disney Company. He received the “Innovator of the Year Award” in 2012 from the Wall Street Journal and was named one of the “top 35 innovators under 35” by MIT Technology Review in 2008.

What book or books have you gifted most to other people?

The Old Man and the Sea, Leaves of Grass (first edition).

If you could have a gigantic billboard anywhere, what would it say?

“Breathe.”

Do you have any quotes that you live you life by or think of often?

“I know nothing.”

What is the worst advice you see or hear given in your trade?

“Fail fast!”

What is something you believe that other people think is crazy?

We’re born with everything we’ll ever need.

Three people or sources you’ve learned from—or followed closely—in the last year?

Wim Hof, Rick Rubin, Rick Owens

What are your favorite episodes of The Tim Ferriss Show?

Rick Rubin and Wim Hof

What is the best or most worthwhile investment you’ve made?

Taking the time to walk to work every day (5 miles, 1 hour 15 minutes)