Permission marketing is marketing without interruptions.

Books work as an art form (and an economic one) because they are primarily the work of an individual.

Little changes cost you. Big changes benefit you by changing the game, but only if you go first.

If you've got the platform and the ability to make a difference, then this goes beyond 'should' and reaches the level of 'must.' You must make a difference or you squander the opportunity. Wasting the opportunity both degrades your own ability to contribute and, more urgently, takes something away from the rest of us.

Great leaders don't try to please everyone. Great leaders don't water down their message in order to make the tribe a bit bigger. Instead, they realize that a motivated, connected tribe in the midst of a movement is far more powerful than a larger group could ever be.

By all means, fire the customers who aren't worth the time and the trouble. But understand that the moment you insist the customer is wrong, you've just started the firing process.

Human beings, thanks to culture and genetics, are inclined to be pessimistic, fearful, skeptical and believers in conspiracy theories. We also don't like change.