'Luck' is recognizing when the situation encourages build out and execution.

I said a long time ago that Foursquare can make cities better. You have these augmented realities like Foursquare and Twitter and Facebook that provide these virtual nodes and instant feedback from anywhere, adding annotation around a physical places.

Meet customers where they are; question how to make the tools customers use more valuable.

I think Twitter is the future of communications and Square will be the payment network.

All my days are themed. Monday is managementTuesday is product, engineering, and design. Wednesday is marketing, growth, and communications. Thursday is partnership and developers. Friday is company and cultureOn the days beginning with T, I start at Twitter in the morning, then go to Square in the afternoon. Sundays are for strategySaturday is a day off.

Constraints inspire us in how we approach the press, how we approach business relationships, how we do everything.

I was fascinated with jeans, because you can impress your life upon the jeans you wear. The way you sit imprints on the jeans.