Go hit up a local affiliate for a workout. I am planning on going to Crossfit Metanoia located at 1013 Pamalee Drive in Fayetteville. They host a free to the public Saturday WOD at 1000. Many other gyms around town do the same. Go burn off some of that glorious meal from Thanksgiving.
And when you start feeling sorry for yourself (like I have been with this sickness) check out:
For some added motivation!