What to do... What to do.

A friend of mine came over last night and we got to talking about what we want to do with our lives. We both came to the conclusion that what we are majoring in as undergrads is not fulfilling. We have aspirations and things we want to change but we haven’t done anything to make this change. I am almost finished with school and whether or not my degree get used as it is intended no longer matters to me as much as it did two years ago. My ambitions have been gradually changing over the last few months from the drive to graduate, get a job, get married, get a better job, buy a house, have kids, retire, and die ... to now wanting to make a difference. I still want love in my life and I fully intend to get married eventually but my work is no longer a top priority. I want to travel while I can, do volunteer work while I can, and more than anything I want to go to Africa to purify water and/or help build schools. How I’m going to pay for these service adventures, I’m still not sure. Any suggestions?