My definition of success is rather easy. It's not money (although, I think that if you have money, you've probably been, or someone close to you has been, successful in SOMETHING).
In my personal life, I think for ME to be successful I need to live and love my life for me and my family. If I raise my children and love my husband with all the love I have to give, I've been successful. When I die, if I'm able to say, " Nice job Sara!", I've been successful.
If I've touched just one life of a child through my teaching...then I've been successful in my job. Teaching is a joy (most of the time)... :)