Here are the resources for the Choose Happiness Even When Life Sucks episode of The Public Speaker
The Problem With Happiness
Another Study by the Same Author Above (Kashdan, T.B., Breen, W.E., & Julian, T. (2010). Everyday strivings in combat veterans with posttraumatic stress disorder: Problems arise when avoidance and emotion regulation dominate. Behavior Therapy, 41, 350-363.