Even if you've never heard of Jack Dorsey, you've probably used something he's built. Although Jack doesn't spend much time in the spotlight, he's hit two major start-up home runs with micromessaging service Twitter and mobile payment system Square. The former has enabled revolutions, and the latter has revolutionized small businesses.
The Twitter cofounder and Square CEO has already left his mark on the Silicon Valley tech scene but is looking to take on something a little bigger: New York City. Jack discussed his past affinity for police scanners, current responsibility leading two companies, and future political ambitions with Lara Logan on 60 Minutes, revealing bits about his personal and professional life along the way. Learn what we discovered about the man behind @jack and watch the full 60 Minutes interview in the gallery.
I really don't know how Jack Dorsey does it. He's currently managing two fast-growing tech companies — Twitter and Square. He apparently spends eight hours at each firm every day and he says the only way to juggle two companies is to "be very disciplined." He also themes his 16-hour days. Here's what his schedule is like, 
We're always trying to understand how the best and brightest got where they are — what wheels put in motion eventually add up to the big success stories. Well, for even the biggest ideas, like Twitter for instance, creators start simply. The simple beginning for 