Know how to drive safely when it's raining or when it's snowing. The two conditions are different.
Know how and how much to tip people who expect gratuities, even in the case of poor service.
Think of a hypothesis as a card. A theory is a house made of hypotheses.
Know how to treat frostbite until you can get indoors.
Be able to go shopping for a bathing suit and not become depressed afterward.
Know where to find the sunrise and sunset times and note how the sky looks at those times, at least once.