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.

Klout and various measurements of influence are fun. I love to see where I score on them, but there's a computer algorithm behind the calculation. If there's an algorithm, it can be gamed. Even if it's not gameable, you have to take a leap of faith that the number of followers, retweets, mentions, whatever really mean something.

Jolt is for Windows programmers. It's typical IBM PC: it goes in brown and comes out yellow. Mountain Dew is for Macintosh programmers: it goes in yellow and comes out yellow. It's WYSIWYP.

The two most important things about people on a revolutionary team are their ability and passion. Their educational level or work experience is meaningless--most of the engineers who did ground-breaking work of the Macintosh design didn't even graduate from college.

An editor who is a mentor, advisor, and psychiatrist. Don't kid yourself-a good editor will make your book better.

There are two types of people on social media: people who want more followers, and liars.

I have developed a Zen-like approach to the operating systems that people use: 'When you're ready, the right operating system will appear in your life.