Owning a truly diversified portfolio might put you out of your personal comfort zone from time to time.

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If your job makes you feel dreary, it could be time to introduce vegetation to your personal breathing zone -- an area of six to eight cubic feet (0.2 cubic meters) -- where we spend most of our working day.

CNN: Office foliage for feel good factor

Kennedy took the due-process argument to heart, rooting his analysis in the right to a zone of personal liberty into which the government may not intrude.

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By comparison, last winter's mental experiment was a breeze: I spent hours in a mesmerized state watching Bobby Clampett swing in super slow motion, on his "Impact Zone: Personal Golf Mastery System" DVD.

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So when a phone clerk said the "World Edition" BlackBerry could keep him connected--even in Japan, a notorious dead zone for Western phones and personal digital assistants--Kozarsky was sold.

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FSA, said the paper, was intending to review or even eliminate the grey zone, in order to reduce the number of personal bankruptcies.

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Accidentally, because of a personal feud between Tony Blair and Gordon Brown, the United Kingdom didn't join the euro zone after Labour came to power in 1997.

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The MIT Sloan School of Management introduced its "competency model" in 2000, creating a four-zone grid that measures demonstrated success, such as test scores and standout work experience, and personal attributes, such as relationship-building skills and sensitivity to others.

WSJ: Business Schools Know How You Think,