Mentor foster children close to "aging out" of the system.
I'm not sure we're in a position to do that right now, but it is something to keep in mind.
Which reminds me, our local news station did a story in honor of Adoption Awareness Month yesterday. A couple in our area just adopted a 16-year-old girl from the foster care system. Her adoption was recently finalized, and the station interviewed the whole family. They were so happy!