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

The magnitude of an action may change not only the strength of its impact, but the direction. If you became a dentist, for example, you would certainly be an asset to our society. But what if everyone became a dentist? Who would bake the bread? Who would build the houses?

The length of your education is less important than its breadth, and the length of your life is less important than its depth.

The squeaky wheel may get the most oil, but it's also the first to be replaced.

The 40s are when you start trading your psychological problems for physical ones.

Be able to draw an illustration as least well enough to get your point across to another person.

Be able to read blueprints, diagrams, floorplans, and other diagrams used in the construction process.