Take a Walk. Or Five.
Each year after Thanksgiving lunch (that's right, as it should be: lunch), my two Great Aunts Nellie and Fern would yell at all the kids to stop loafing around the house and go for a walk. We got tired of listening to them yell, so we eventually complied and took a walk.
It's only now as an adult do I realize how right they were! Going for a walk can help your body manage stress, improve your mood, and strengthen your immune system. If you need proof, my Aunt Nellie lived to be 92 and Aunt Fern was nearly 80! They didn't get that way by loafing around after lunch, you know.
So if you're at work and have an errand, don't fire up your car - walk instead! You can always use a break to stretch your legs. Likewise, if you find that there's a little too much "family togetherness" during the holidays, go for a quick walk!