Most people who wake up at 4 a.m. do it because they have to—farmers, flight attendants, currency traders and postal workers. Others rise before dawn because they want to. Russ Perry, the 33-year-old Scottsdale, Ariz., resident and founder of graphic design firm Design Pickle, says that 4 a.m.
from Pocket http://www.wsj.com/articles/why-4-a-m-is-the-most-productive-hour-1471971861
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