Chap Oscar Smith talks about the key to happiness--"accentuate the positive" and "elminate the negative," You should always choose to be happy. It is a conscious choice. Voltaire says, "I choose to be happy because it is good for my health."
Buy what makes you happy. Watch what makes you happy. Do what makes you happy. Be with people who make you happy. Work at what makes you happy. Remember -- it is always a choice.
Be sure to eliminate the negative. Life is too short to be around negative people, to spend your time with those people. Don't focus on those things that make give you regrets or make you unhappy.
Notice how some people light up a room when they enter, and then, there are those who light up a room when they leave. Of course there are all the degrees of people in between. Seek out the positive, happy people and you will find that they are contagious.. You should always strive to be happy. You, go out and make someone happy today.