there are 4 hormones which determine a human's happiness - 1. Endorphins, 2. Dopamine, 3. Serotonin, and 4. Oxytocin. It is important we understand these hormones,as we need all four of them to stay happy. Let's look at the 1st hormone the Endorphins. When we exercise, the body releases Endorphins. This hormone helps the body cope with the pain of exercising. We then enjoy exercising because these Endorphins will make us happy. Laughter is another good way of generating Endorphins. We need to spend 30 minutes exercising every day, read or watch funny stuff to get our day's dose of Endorphins. The 2nd hormone is Dopamine. In our journey of life, we accomplish many little & big tasks, it releases various levels of Dopamine. When we get appreciated for our work at the office or at home, we feel accomplished & good, that is because it releases Dopamine. This also explains why most housewives are unhappy since they rarely get acknowledged or appreciated for their work. Once, we join work, we buy a car, a house, the latest gadgets, a new house so forth. In each instance, it releases Dopamine and we become happy. Now, do we realize why we become happy when we shop? The 3rd hormone Serotonin is released when we act in a way that benefits others. When we transcend ourselves and give back to others or to nature or to the society, it releases Serotonin. Even, providing useful information on the internet like writing information blogs, answering peoples questions on Quora or Facebook groups will generate Serotonin.