You're building a tool, not a piece of art. Don't be blinded by the vision.

I'm weird. But I'm a pretty serious person.

It takes some experimentation to figure out what people like and don't like.

If I ever thought I wasn't the right guy for the job, I'd be the first person to fire myself.

Once you have something so deeply infused in your culture and your brand, it would be very difficult to reverse that inertia if you wanted to.

Groupon as a company - it's built into the business model - is about surprise. A new deal that surprises you every day. We've carried that over to our brand, in the writing and the marketing that we do, and in the internal corporate culture.

When you think of couponing, you picture a mom cutting coupons out of the back of the newspaper.