Pursue joy, not happiness. This is probably the hardest lesson of all to learn. It probably seems to you that the goal in life is to be happy. Oh, you maybe have to sacrifice and study and work hard, but, by and large, happiness should be predictable.

The record of what you do is forever recoverable because of Google. The lofty upside and scary downside makes reciprocity more important than ever. This is all good because it makes people think more before they do something that reduces their trustworthiness.

Try stuff. I also used to believe that it's better to be smart than lucky because if you're smart you can out-think the competition. I don't believe that anymore-this is not to say that you should strive for a high level of stupidity. My point is that luck is a big part of many successes, so (a) don't get too bummed out when you see a bozo succeed; and (b) luck favors the people who try stuff, not simply think and analyze. As the Chinese say, "One must wait for a long time with your mouth open before a Peking duck flies in your mouth."

If you don't toot your own horn, don't complain that there's no music.

"(Big name research firm) says our market will be $50 billion in 2010." Every entrepreneur has a few slides about how the market potential for his segment is tens of billions. It doesn't matter if the product is bar mitzah planning software or 802.11 chip sets. Venture capitalists don't believe this type of forecast because it's the fifth one of this magnitude that they've heard that day. Entrepreneurs would do themselves a favor by simply removing any reference to market size estimates from consulting firms.

It's a very valuable skill to succeed in life whether you work for a startup or a Fortune 500 company.

If you use social media right, you will piss people off. It's actually recommended!