Breakthrough ideas usually come from guys who look like they're hallucinating

In my experience as CEO, I found that the most important decisions tested my courage far more than my intelligence.

Leadership is hard to train on.

When raising money, you want to look through the lens of 'What happens when things go wrong?'

It's quite possible for an executive to hit her goal for the quarter by ignoring the future.

Groupon looked like a very high valuation, but any investment in a great company at any stage is almost always a good investment.

It's pretty clear that [customers] know what their budgets are now, and what they want to spend it on.