There’s more to leading a healthy lifestyle than following an eating and exercise plan. Finding happiness in your everyday life can also make a positive impact on your overall health. According to a study in the Proceedings of the National Academy of Sciences, happiness has a positive effect in lowering cortisol levels, the stress hormone that is related to health conditions like type 2 diabetes, hypertension, and autoimmune diseases. But if you aren’t feeling that happy on a daily basis, what can be done to change that?