We all want to be happier. And why not? Our forefathers did, after all, declare it to be one of our inalienable rights. Besides, having a positive glow doesn’t just feel good — it’s good for us. What's going on in our head is strongly connected to what's going on in the rest of our bodies: If you're feeling emotionally low, physical lows tend to follow.

Competing demands, a tough boss, money stress and bratty kids — these are all parts of life that can drain us and pull us down. Learning how to fight stress and stay upbeat has a positive domino effect on our lives. We tend to be kinder, which leads to more satisfying relationships. We sleep better, which gives us more energy and makes us more productive. And we may even bolster our immune system, which can lead to a longer life.