If you're not stubborn, you'll give up on experiments too soon. And if you're not flexible, you'll pound your head against the wall and you won't see a different solution to a problem you're trying to solve.

It's harder to be kind than clever

Am I going to regret leaving Wall Street? No. Will I regret missing the beginning of the Internet? Yes.

You can work long, hard, or smart, but at Amazon.com you can’t choose two out of three.

Percentage margins don't matter. What matters always is dollar margins: the actual dollar amount. Companies are valued not on their percentage margins, but on how many dollars they actually make, and a multiple of that.

Seek instant gratification - or the elusive promise of it - and chances are you'll find a crowd there ahead of you.

You don't want to negotiate the price of simple things you buy every day.