I've met simple people, with not much money or education, although they are successful to me cause they managed to create a nice family and have a happy life. Something that usually its hard for people working towards their careers 24/7.
Hesiod once wrote 'Moderation in all things'. That personally is my moto. I don't have to have done something that is out of this world to be successful. I can be successful enough by valuing my own time, raising my kids in a proper manner and generally being happy. If I am happy, I am successful.