As we set course for a new year, many among us seek to better ourselves through resolutions that include changes in diet and physical exercise. What bandwagon of betterment should you be jumping on? The answer may be in the stars. U.S. News & World Report has revealed the best diets and, perhaps unsurprisingly, that olive oil-chugging showboat the Mediterranean diet took the No. 1 spot for best overall for the seventh year in a row.