Forget all the conventional 'rules' but one. There is one golden rule: Stick to topics you deeply care about and don't keep your passion buttoned inside your vest. An audience's biggest turn-on is the speaker's obvious enthusiasm. If you are lukewarm about the issue, forget it!

Passion. The life of an entrepreneur is occasionally exhilarating, and almost always exhausting. Only unbridled passion for the concept is likely to see you through the 17-hour days (month after month) and the painful mistakes that are part and parcel of the start-up process.

An era similar to the one in which the black rotary phone dominated its product category may not recur anytime soon.

Success requires a persistent misreading of the odds.

Quite simply, no matter how hard you try, no matter how "open" you are, you'll end up surrounded by "yes people." It's hard not to believe people who are repeating your own ideas. Resist the temptation.

I endorse a lot of people - sometimes people say I endorse too many books. And my response has always been the same: If I can get one case study that can give me one good idea that I can implement for $25, or for these days one-third of that on Kindle, I've gotten a very good deal.

If you're a leader, your whole reason for living is to help human beings develop - to really develop people and make work a place that's energetic and exciting and a growth opportunity, whether you're running a Housekeeping Department or Google. I mean, this is not rocket science.