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According to Wiedeerman (2007), if you want to be happier, you have to or you have not to engage in these four practices.
References:
Wiederman, M. (2007). Why it's so hard to be happy? Scientific American Mind, 18 (1), 36-43. doi: _________
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What is do not focus on goals; volunteer during your free time; practice moderation, and strive for contentment?