Know how and how much to tip people who expect gratuities, even in the case of poor service.
The chess player who develops the ability to play two dozen boards at a time will benefit from learning to compress his or her analysis into less time.
Feeling is what you get for thinking the way you do.
Be able to identify the most common breeds of dogs and cats on sight.
Profit is what we have left after we make a donation to a worthwhile cause.
When you're in a good mood, bring up the past. When you're in a bad mood, stick to the present. And when you're not feeling emotional at all, it's time to talk about the future.