There are a gazillion tips on stress reduction out there. Exercise is on every one of those lists. Try to carve out some time for it especially if it is a part of your normal routine. Forgive yourself for the holiday disruptions in your schedule. If exercise isn’t a part of your normal routine consider a taking a walk, even if its just a short one each day. The experts (I am not one of them) seem to think that getting outside, breathing deeply, and seeing the sun really will make you feel much better even if it is cold and blustery.