Often, we hear people say, "When I get this / When this happens, then I will be happy." What if you turned that around, and said, "No matter what happens, I will be happy."? How about focusing on the good things you do have, and enjoy the process of working for your dreams, instead of what you lack, or the outcome of what you are working toward? Seeking happiness from outside of yourself always leaves you looking for more. When you make the choice to stay positive and remind yourself of the good, thinking of difficult times as 'challenges' instead of 'problems', notice how your perspective also changes. When you are happy on the inside, everything outside of you will make you happy. Anything you receive or experience will be enough. When you are not happy, not even a billion-dollar job or the best spouse in the world is going to lift you up.
So why not take a shot at being positive and happy, and see how life turns around? All it takes is a moment, a conscious choice.