Why Wait Until Jan. 1? Start This Supersimple 6-Step Fat-Loss Plan Today

"Never miss a healthy meal twice," Carter suggested. It's OK to indulge on brunch or have a decadent dinner, but make sure the next meal is a healthy one. This will help you follow the 80/20 rule, where you eat healthy 80 percent of the time, and the other 20 percent you can enjoy the less-healthy foods you crave.