No is no to one thing. Yes is no to a thousand things.

Someone once told me that one “yes” must be defended over time by 1,000 “nos.” Early in my career I didn’t understand this at all. Today, I think it’s an understatement.

Start getting into the habit of saying no—even to many of your best ideas. Use the power of no to get your priorities straight. You rarely regret saying no. But you often wind up regretting saying yes.

when you say “yes” to one thing you are inevitably saying “no” to another.