Ring in 2013 with accountability. People who make New Year's resolutions are 10 times more likely to successfully establish change than non-resolvers who have identical goals and comparable motivation to change, according to a 2002 study by Dr. John C. Norcross at the University of Scranton. That said, the fitness-related goals may be the toughest to reach. According to Bodybuilding.com, 73 percent of people who make fitness-based New Year's resolutions give up on those goals before they are met.

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