Of course, the foods you eat don't necessarily determine how much pain you have. However, there are some foods that can help relieve some types of inflammatory pain. Now is a good time to plan ahead, and to decide what you will splurge on and what you will avoid.
Splurge-worthy foods include fresh fruits and vegetables, whole grains, legumes and water. Fill up on these first, and then you won't be tempted to eat as much of the "other stuff" that is not so good for you. That includes food high in sodium, and other processed ingredients. Rather than cut out all of that delicious holiday food, just eat less.
For more on anti-inflammatory foods, check out this article by about.com's Guide to nutrition.