BUSINESS
03/28/2008 02:45 am ET Updated May 25, 2011

Meet The Guru Of The "4-Hour Workweek"

AS one of Silicon Valley's most respected entrepreneurs, Marc Andreessen is something of a connoisseur of what he calls "productivity porn," or techniques to maximize personal productivity.

But in recent months, Mr. Andreessen -- a founder of Netscape Communications and more recently Ning, which allows users to create their own social networks -- has become enthralled with an unlikely purveyor: Timothy Ferriss, a boyish first-time motivational author from Long Island whose curriculum vitae includes stints as a competitive kickboxer and tango champion.

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