"A word of caution," he said. "Be very careful about trying these techniques at home."

"Why?" asked someone from the audience.

"I watched my wife's kitchen routine for years," the expert explained. "Making dinner, for example, she made lots of trips between the refrigerator, stove, table and cabinets, often carrying a single item at a time."

"One day I told her, 'Honey, why don't you try carrying several things at once?'"

"Did it save time?" the guy in the audience asked.

"Actually, yes," replied the expert. "It used to take her 30 minutes to make dinner. Now I do it in 10."