7. Exercise.
Another huge point of concern regarding the holidays is all that delicious food (and the calories that come with it). First of all, don't overly stress about extra calories. Enjoy yourself and don't get too obsessive, but also don't completely binge. Though regardless of your eating habits, you should be exercising. This one is important year round—as we know exercising is good for both your body and mind—but it's especially helpful during the holidays. Though it may be hard to find the time, even getting in a quick HIIT workout will do the trick! 

Image via @hannahbronfman