Secret of happiness

Having a lunch listening to friend complaining about his work. The whole conversation becomes grey. That makes me reflect that am I such a person most the time. Will like to know how to become a positive person, and spread the positive energy. Emotion can be contagion. There is always thing that you can't own or get in life, why some can just easily get over it while others not.

That keep me wonder about the secret of happiness. I am seeking the answer.