From BusinessWeek, February 11, 2008…
Researchers from several large universities determined that people who rate themselves as an 8 on a happiness scale of 10 (ten being the most happy), actually achieve and earn more than those who top out at a 10.  So, why are the slightly less happy workers doing better than their extremely happy counterparts?
The theory is that the 8s excel at work because they “know when to worry.” Apparently, a little negativity can’t hurt when it comes to a realistic outlook on the job. Don’t slide too far down the happiness scale, though. Studies show that happiness is associated with many benefits, such as better health.
Realistic, yet happy..Seems like a good life balance.
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