Remember, you don’t have to accept every holiday treat that comes your way. Practicing moderation by only indulging every now and then will help keep your nutrition and diet goals on track. “It’s OK to say no,” Sepel said. “Be confident and very politely say ‘no thanks.’” She also pointed out that you should never let a splurge lead to an out of control downward spiral. “Recommit to your healthy eating habits right away,” she said.