I love it.
It is easier said than done, but by practicing it day by day we can all change and this is one of my first things on the list too, since I believe life will be happier if we look for the good things in life instead of all the negative things most people are including me.
Day by day, step by step and it will change your life. It doesn't mean it will be easy and we will not mess up once in a while, but as long as we don't quit we can do anything.