Read this in The Happiness Project:
Feeling bad is a sign that it’s time for action. Change is often painful; unpleasant, disruptive; exhausting; scary. Unhappiness can act as the goad to get you to push through those barriers. It can push you to switch jobs, get out of a relationship, move, change your habits, change your behavior, change the world. You can start meditating, start running, start a non-profit, start a garden. Everyone’s happiness project is unique, and the approach that you take to address your unhappiness is unique.