Is It Cheating to Have a Side Project?
Harvard Business Review
JULY 9, 2012
You should be spending at least 1,000 hours a year--that's about six hours a week; about an hour a day — preparing for a new career (Just in case that your industry goes the way of publishing, pay phones, photo finishing and the like and either disappears or radically changes to the point where there is no room for you.).
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