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

Early in my career as an engineer, I’d learned that all decisions were objective until the first line of code was written. After that, all decisions were emotional.

Note to self: It’s a good idea to ask, “What am I not doing?

Hire sales people who are really smart problem solvers, but lack courage, hunger and competitiveness, and your company will go out of business.

You know what the difference between a vision and a hallucination is? They call it a vision when other people can see it.

There are no silver bullets.

There are no silver bullets.

It turns out that is exactly what product strategy is all about—figuring out the right product is the innovator’s job, not the customer’s job.

I believe in strength over lack of weakness.

Here’s where we are and here’s what I didn’t recognize about us and about you when I made the decision, and now it is what it is.

The one thing with stress is, you’ve got to keep your focus on what you can do, not what happened to you.

There is no silver bullet. There are always options and the options have consequences.

When I was CEO, and I’d listen to music, a lot of people listen to music and you get inspiration from it. And a lot of things in hip hop are very instructive for being in business. Particularly, hip hop is a lot about business, and so it was very useful for me in any job.

The trouble with innovation is that truly innovative ideas often look like bad ideas at the time.

A lot of it is on the job training, combined with excellent mentorship.

Nothing motivates a great employee more than a mission that’s so important that it supersedes everyone’s personal ambition.

There are no shortcuts to knowledge, especially knowledge gained from personal experience. Following conventional wisdom and relying on shortcuts can be worse than knowing nothing at all.