The first is lack of sleep. You’ve got parties to go to, family to visit, you’re not sleeping in your own bed — it wears you down. Avoid sleeping aids if you can, so instead try an old trick: naps. Even 20 minutes in the afternoon can make a huge difference in your energy level.
Second is alcohol. Calories, hangovers, and mood swings generally do not make for merriment. At the same time, a hot toddy can make all the Bing Crosby music easier to deal with. Drink in moderation. And alternate each drink with a glass of water.
The third is exercise. Each morning, before anything else, do a quick and simple workout.
