Dr. Oz

Photo: Nigel Cox

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As you kick off 2012, forget the grand promises (I'm going to run 21 miles a week! eat spinach every day! quit dessert!)—and commit instead to starting small. Mehmet Oz, MD, has assembled a list of 28 meaningful yet manageable steps you can take toward a longer, fuller life. Make one of these changes every day, and before the month is up you'll feel like a whole new you.