The ultimate definition of success is: you could lose everything that you have and truly be okay with it. Your happiness isn't based on external factors.

If you're focused on the friendship as its own reward, serendipitous stuff just happens. I know that sounds weird, but I can tell you for our 12 years of existence, it's actually how a lot of stuff happens.

Happiness is really just about four things: perceived control, perceived progress, connectedness (number and depth of your relationships), and vision/meaning (being part of something bigger than yourself).

There's a big difference between motivation and inspiration: Inspire through values and motivation takes care of itself.

Zappos uses call center technology to track average call time per agent. But the goal isn't to reduce this average - it's more important that we make an emotional connection with the customer, rather than just quickly getting them off the phone.

Instead of getting an iPad, I now use my iPhone with a giant magnifying glass attached to my face.

Most innovation comes from outside your industry applied to your own