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

Spending waiting moments doing crossword puzzles or reading a book you brought yourself.

Although spoken English doesn't obey the rules of written language, a person who doesn't know the rules thoroughly is at a great disadvantage.

I suspect that some apparently homosexual people are really heterosexuals who deeply phobic about the opposite sex or have other emotional problems.

Know the function of a fuse box and the appearance of a tripped circuit breaker.

Know how weather, especially humidity, can affect the movement of doors and windows.