Kiss holiday stress goodbye! With the holiday season in full swing, at least half of us experience a surge in stress levels. That’s when we get headaches and have indigestion. New research shows you how to dial down stress and feel truly calm, cool and collected. Pretend to be relaxed. Focus on taking slow, deep belly breaths, relax your shoulders and speak in a soothing voice, says John Garrison, Ph.D. director of Lahey Clinic’s Stress Management Program.