The demands of the holiday season will disrupt your typical routine to some degree. Make sure small “lapses” in exercise, adequate sleep, and healthy eating don’t turn into “collapses.” If you have to skip a workout, make doubly sure that you reserve time in your schedule to go to the gym the next day.

– J. Russell Ramsay, Ph.D., is co-author of The Adult ADHD Tool Kit, cofounder and codirector of the Adult ADHD Treatment and Research Program and an associate professor of clinical psychology in psychiatry in the University of Pennsylvania’s Perelman School of Medicine.