ok, well, this is for the detroit zoo, since that's near me, but you can adopt an animal from just about any zoo i'd say.
RESULTS helps fight poverty, mostly by writing letters to congress etc.
you can go there to find volunteer work in your area.
I'm going to help with kids and senior citizens - well possibly not the senior citizens because i'm pretty sure that you have to be older to go visit them there.
those are the signup thankyous.