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.

After four and a half intense and wonderful years as CEO of Groupon, I've decided that I'd like to spend more time with my family. Just kidding - I was fired today.

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

One thing I've come to learn about myself is that I have to keep going.

I just like to build things and do things.

Flowers are a proud assertion that a ray of beauty out values all the utilities of the world. If dandelions were hard to grow, they would be most welcome on any lawn.

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.