When do you launch? When do you act? When do you change? The cofounder of Square has answers.

To be a high-performer and "best in class," action is not enough. You must have a winning mindset.

Work the puzzle, "methodically looking for a solution until you run out of oxygen."

Instead of just asking "Why me?" ask yourself these questions to determine if becoming an entrepreneur after you retire from your job is a smart move for you.

Making yourself into an "I" character can help you put some distance between yourself and your ego, eschew perfectionism, and get reacquainted with what you really believe in.

Resist the temptation to always be "on."

The television reality show is a crash course in business and entrepreneurship.

"Normal" has gone out the window.

Entrepreneurs think they'll provide that extra "oomph" to their business. The opposite may often be true.

Entrepreneurs who wish to find real, lasting happiness need to pursue what the Greeks called "xn."