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An efficiency expert concluded a lecture with an note of caution, "you don't want to try these techniques at home."

From the back of the audience someone asked, "why not?"

"Because," the efficiency expert explained, "I watched my wife's routine at breakfast for years. She made lots of trips to the refrigerator, the stove, the cabinets, often carrying just a single item at a time. I said to her, 'why don't you just try carrying several things at once and you won't have to make as many trips? That would be a little more efficient."'

The same voice asked, "well, did that save time?"

The expert replied, "actually, yes. It used to take her about 20 minutes to get breakfast ready. Now I do it in about 7."