I also think if you are happy and feel good about yourself, your life is successful!
This reminded me of a posting by 双头龟 (love his cartoons!)...some people are never satisfied with what they have, they never stopped seeking for new challenges...these people might be more "successful", but definitely less happy.
"Success" 如 clothes judged by others; "happiness" 如 shoes felt by your own toes.
May everyone be happily successful and successfully happy...hehe
