Nice article! More informative than most, by far.
The "don't wait" info that Doug pointed out is more vital than most people realize. Most people (adults or kids) rarely stop when they realize they're lost, they always seem to keep going. The longer the search is delayed, the larger the search pattern becomes.
People often ask "Well, why didn't they use those search dogs?" They don't use them (or don't succeed with them) because the window of opportunity for dogs is a lousy four hours or so, depending on climatic conditions. Rarely does the notification of disappearance, added to the search crank-up time, give dogs much of a chance to do their job.
Sue