Try this: Take a sheet of paper and write "Who I am serving" at the top. Then, begin to list off the people and animals whose lives you are making better as well as the causes you support.
For instance, I have my husband on the list. I also have two friends that I am supporting through phone calls and mailings while they are experiencing difficult times. A dear friend has her dogs on her list (they have a great lives with her). She also serves the world as an avid recycler and by being a well informed voter regarding environmental issues.
Remember, your actions don't have to be big to count; making one person's life better is incredibly important. And, you aren't helping anyone by denying the differences you are making.
I know that you are helping others. So who are those lucky people anyway?