Tony Robbins explains that you can train your emotions. You can train yourself to be stressed or you can train yourself to be happy. This seems like good advice.

I believe also that you can train yourself to be happy by your choices in how to frame episodes of your life. You can also help yourself by choosing upbeat words. I notice that many people who curse often get upset at trivial things. “Can’t find my keys, God Damnit!” They are making themselves agitated by their choice of words.