Society needs people who can manage projects in addition to handling individual tasks.

Scientists and creationists are always at odds, of course.

Understand why casinos and racetracks stay in business - the gambler always loses over the long term.

Know how and how much to tip people who expect gratuities, even in the case of poor service.

Almost all of the finer things in life are free or nearly free. You don't have to pay for the sky at night or snow in the morning or a kiss on the nose when you're sick. Forgetting that may put you at the mercy of those who seek to profit by convincing you to want whatever it is they have to sell.

Be able to analyze statistics, which can be used to support or undercut almost any argument.

Be able to recognize the dangerous snakes, spiders, insects, and plants that live in your area of the country.