Know where to find the sunrise and sunset times and note how the sky looks at those times, at least once.

Be able to defend your arguments in a rational way. Otherwise, all you have is an opinion.

A friend is someone who stays by your side all through the troubles he's caused you.

Common sense comes from experience, and kids need to fail as well as succeed in order to learn it. It's difficult to develop common sense when you spend a lot of time in your room where nothing much happens.

Be able to hiccup silently, or at least without alerting neighbors to your situation. The first hiccup is an exception.

Know how to garnish food so that it is more appealing to the eye and even more flavorful than before.

Think of a hypothesis as a card. A theory is a house made of hypotheses.