The key to so much of our emotional well being is attention. The three blessings exercise can increase happiness by thinking of three good things that happened in the last 24 hours, and you rattle them off as if they were all happening at once. We should say, the tee nager can be happy while making the parents miserable. I think what teen agers experience is actually like high highs and low lows. It's lot of scientific evidence for that too.