I think you have to read a lot. I think if you're going to write about something you better have read at least 100 books on that topic.

Stress comes from knowing what is right and doing what is wrong

What you think about, talk about, and get off your ass and do something about, comes about.

Don’t measure busywork. Don’t measure activity. Measure accomplishment. It doesn’t matter what people do as much as it matters what they get done.

If you're not booked, you're not any good!

If you're selling information - and I have a lot of friends who write a lot of bestselling books and they're selling information. They don't need to have a picture on the cover at all because they are not important. They're secondary to their information. To me, the information is secondary to me.

I think it's more helpful to keep your books sort of a singular focus. Get it said, get it said well, fascinate people with your words and then write another book.