Many people would view this approach as advice for building a charity or aiming a business only at your close friends — it couldn’t possibly be applied to a business that makes enough money to put clothes on the children, keep food on the table, and pay the rent. But this is precisely how I built a business that, for over a decade, has had a waitin

Become the best in the world at what you do. Keep redefining what you do until this is true.

But life is not a portfolio: not for a startup founder, and not for any individual. An entrepreneur cannot “diversify” herself: you cannot run dozens of companies at the same time and then hope that one of them works out well. Less obvious but just as important, an individual cannot diversify his own life by keeping dozens of equally possible caree