Measurement of Success

I'm sure many people would say that those who achieve wealth, power and/or fame are successful. True, these can be an indicator & for some those are the only ones that are important. To me they only matter if, those who have attained to those levels actually use it for the greater good. Personally, I believe, our success comes from what we've done to make things better for others. Which is why I always encourage some form of volunteering. We don't do it to receive recognition. Though sometimes we do get that from those who appreciate our efforts. What do you consider a measure of success?