Most of the time, the things that really change the world exist for something fundamentally selfish and then the world-changing ends up being a side-effect of that.

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.

Life is too short to be a boring company.

I never thought of myself as an entrepreneur before I started this. I just like to build things.

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

Most small business owners are not particularly sophisticated business people. That's not a criticism; they're passionate about cutting hair or cooking food, and that's why they got in the business, not because they have an MBA.

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