What's your purpose?

I recently listened to an interview with author Daniel Pink (via Elizabeth Marshall’s free Author Teleseminars) about his new book Drive. (Confession: I haven’t read it, so I’m basing this blog post on the author interview, which ran about an hour. If you want to learn more about this, you should read the book, which […]

Helping girls get educated

Warning: This is not a typical MarkTzk.com blog post. Let me tell you a personal story. I have two daughters. They were both born in Guatemala and lived there, in foster homes, until my wife and I adopted them. I still remember seeing children — whole families of children — standing on a sidewalk during […]