I went to Tanzania to help out a community center in Kigambani with teaching English, and helping secure scholarships for children to go to school. I still keep in contact and do work for this center.
I volunteer my time as an assistant scoutmaster for Troop 107 in my town, and as an advisor to the Venture Crew, even though I don't have any sons, and I don't have any kids old enough to join Venture.