A mark of discipline is not simply choosing between good and bad, but between good and best.
Out of all the things you could say, choose the things you should say to accomplish your goal.
It's better to say a lot about a little than a little about a lot.
If you don’t have a target, you’ll hit it every time.
You're always selling.
Just because you can, doesn't mean you should.--say something, use a gimmick in Powerpoint, etc.