A lot of people realize "I don't have to work in this job that I'm miserable at every year, or every day, and I don't have to live in, for example, New York City where it's super expensive and if I live somewhere else that is less expensive and could pursue my passion like, I can afford to do that."

Twitter is like hugging. Just because it's hard to measure the return on investment doesn't mean there isn't value there.

At Zappos, one of our core values is to Pursue Growth and Learning. In the lobby of our headquarters, we have a giving library where we give away books to employees and visitors that we think will help with their growth, both personally and professionally. I can't wait to add The Compound Effect to our library.

Don't be cocky. Don't be flashy. There's always someone better than you.

I'd rather spend money on things that improve the customer experience than on marketing.

Get the culture right, and everything else just falls into place.

Our belief is that if you get the culture right, most of the other stuff, like great customer service, or building a great long-term brand or empowering passionate employees and customers, will happen on its own.