Do not restrict yourself over the holidays
Restricting calories over the holidays is never a good idea for a multitude of reasons. Let me start by saying that a diet break for a couple weeks can actually accelerate fat loss once you return to a calorie restricted diet. The reason for this is that when a person diets for a number of weeks in a row for a long period of time, a hormone called leptin (king of all fat burning hormones in the body) is depleted. By taking a break from calorie restriction, leptin is restored.