Hire great people and give them freedom to be awesome.

I think the big thing about Groupon is just people had never seen anything grow quite so fast.

I just like to build things and do things.

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

A lot of people can raise money.

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.

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