A clever skeptic challenges popular assumptions about what it means to be happy. I can't recommend this one enough.
Burkeman, O. (2013). Antidote: Happiness for people who can't stand positive thinking. London: Faber And Faber. (info, library)
Exploration of scientific studies lending practical insights into the relationship between the mind and body.
Blakeslee, S. & Blakeslee, M. (2008). The body has a mind of its own: New discoveries about how the mind-body connection helps us master the world. New York: Random House. (info, library)
An essay by Phillip Moffitt will provide you with enough ideas to work with for weeks or months. They are all practical and life-changing because they he’s interested in getting to root causes instead of being sidetracked by surface symptoms. An entire book devoted to his perspective is invaluable.
Moffitt, P. (2012). Emotional chaos to clarity: How to live more skillfully, make better decisions, and find purpose in life. New York: Hudson Street Press. (info, library)
Investigates the differences between fear, anxiety, and stress using the stories of real people who have learned to navigate them.
Clark, T. (2011). Nerve: Poise under pressure, serenity under stress, and the brave new science of fear and cool. New York: Little, Brown and Company. (info, library)