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Omdenken volgens Dale Carnegie

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It isn’t what you have, or who you are, or where you are, or what you are doing that makes you happy or unhappy. It is what you think about.

Dale Carnegie

Laatst aangepast op woensdag, 04 september 2013 19:39  

If I had an hour to solve a problem I'd spend 55 minutes thinking about the problem and 5 minutes thinking about solutions.

Albert Einstein

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12 rules for life jordan peterson

12 Rules
For Life An Antidote to Chaos
Jordan B. Peterson

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