Lloyd Blankfein was an unhappy lawyer.

Blankfein didn't take the typical route to finance. He actually started out as a lawyer. He got his law degree from Harvard at age 24, then took a job as an associate at law firm Donovan Leisure.

"I was as provincial as you could be, albeit from Brooklyn, the province of Brooklyn," Blankfein told William Cohen at Fortune Magazine.

At the time, he was a heavy smoker and occasional gambler. Despite the fact that he was on the partner track at the firm, he decided to switch to investment banking, joining J. Aron at the age of 27.


Jay-Z was already in the rap scene, but was 'relatively anonymous.'

Born Shawn Carter, Jay Z grew up in a housing project in Brooklyn, New York and became known as "Jay Z" at the age of 20. For the next few years he appeared alongside various other rappers, but "remained relatively anonymous" until he founded the record label Roc-A-Fella Records at the age of 27 with two other friends. The same year, Jay Z released his first album, "Reasonable Doubt."


Mark Zuckerberg's Facebook was cash positive for the first time and hit 300 million users.

Mark Zuckerberg had been hard at work on Facebook for five years by the time he hit age 25. In that year — 2009 — the company turned cash positive for the first time and hit 300 million users. He was excited at the time, but said it was just the start, writing on Facebook that "the way we think about this is that we're just getting started on our goal of connecting everyone."

The next year, he was named "Person of the Year" by Time magazine.

SOURCE; http://ogamayor..com/2013/03/what-extremely-successful-people-did.html