The holidays are busy. Busyness is like an addiction. This claim was addressed recently in a Yoga Journal article. Busyness, and the multi-tasking that is associated with it is called, "Activity Addiction."
"Activity addiction is like any other addiction: As it progresses, you need more and more hits to get the original glow. So you add one more item to your schedule, then another."
To get out of the busyness cycle, and learn how to balance an active schedule, the article suggests practicing meditation - internal and external mediation.