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Here's a radical idea: you know too much. Sure, some knowledge is important, but how much of what you "know" — which celebrities are breaking up, or the gaffe some politician made today — really has an impact on your life? As we learned from the Blinkist summary of Tim Ferriss' bestseller, "The 4-Hour Workweek," being productive requires massive output, and that requires reducing your input. That's why he recommends going on a low-information diet.