Even something that sounds as simple as paying attention to breathing can have tremendous health benefits. A meta-analysis recently published by the Journal of the American Medical Association (JAMA) indicates that depression, anxiety, and pain can all be relieved to a significant degree by meditation. If nothing else, something as simple, free, and available to everyone is worth using when dealing with these conditions.
Time Article: We Need To Take Meditation More Seriously As Medicine
Study: Meditation Programs for Psychological Stress and Well-being: A Systematic Review and Meta-Analysis