
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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Believe it can be done. When you believe something can be done, really believe, your mind will find the ways to do it. Believing a solution paves the way to solution. Dr. David Schwartz (auteur van"The Magic of Thinking Big") |
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