Know how to behave at a fine restaurant, which is a telltale measure of social maturity.

People who work crossword puzzles know that if they stop making progress, they should put the puzzle down for a while.

Know what to do if you feel faint or dizzy, especially if you might fall and hit your head.

I believe that one becomes stronger emotionally by taking life less personally. If your employer criticizes your report, don't take it personally. Instead, find out what's needed and fix it. If your girlfriend laughs at your tie, don't take it personally. Find another tie or find another girlfriend.

A good idea will keep you awake during the morning, but a great idea will keep you awake during the night.

Know how your representatives stand on major national or state issues.

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