When I think about that which feels good, that which brings me joy and satisfaction, I am sending forth into the heavens a request for more of the same. For in a Universe orchestrated by the Law of Attraction, my thoughts bring to me the circumstances of my life. This is the underlying cause of why things occur as they do, and there is no circumventing it.
It is simply not worth it for me to dwell on anyone's foibles, any sort of lack I perceive in my life, or any bad memories. If I catch myself focusing on that which makes me feel unhappy, I let it go and turn my attention to that which feels good. When my thoughts feel good, I attract more good in a powerful way.