Tumregler

"A rule of thumb is a homemade recipe for making a guess. It is an easy-to-remember guide that falls somewhere between a mathematical formula and a shot in the dark. A farmer, for in­stance, knows to plant his corn when oak leaves are the size of squirrels' ears. An economics profes­sor knows from sad experience that inviting more than 25 percent of the guests for a univer­sity dinner party from the economics depart­ment ruins the conversation."

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"The heavier the traffic, the less you gain by changing lanes."
"It takes two minutes for the sun to drop out of sight once it touches the horizon."
"A camel is good for 1 - 2,000 miles."
"Measure twice, cut once."
"Zigzag to outrun a crocodile."