I followed Swami Vivekananda's teachings when I was young. He said, this life is short, its vanities are transient. He alone lives who lives for others. I think more than any other country, in our country, this is very important today. 'Others' also includes family members, because charity begins at home. But if you are an educated person, do something which can help improve the lives and livelihoods of your fellow people. And then towards the latter part of your life, you feel more satisfied that you have one something not only for yourself or for your family, but you have done something which has made a slight difference in the lives of the less privileged.
On his ideals in (25 October 2011)"In Conversation: M. S. Swaminathan" (pdf).