There are many ways to stay healthy over the holidays. One suggestions is to get a flu shot to prevent yourself from catching the flu in the first place. Another great thing to do is to stay active, be in indoors or outside on a warmer day. This is a great way to stay fit and reduce stress. Doing something you enjoy, be it with your family or alone during the busy holiday season can also help you stay less stressed out and prevent you from getting sick.
http://www.canadianliving.com/health/mind_and_spirit/12_ways_to_stay_healthy_this_christmas.php