
Concentration is the key to economic results. No other principles of effectiveness is violated as constantly today as the basic principle of concentration
Peter Drucker
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juni
14
2011

Concentration is the key to economic results. No other principles of effectiveness is violated as constantly today as the basic principle of concentration
Peter Drucker
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Time is our most valuable asset, yet we tend to waste it, kill it, and spend it rather than invest it. Jim Rohn |
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