Welcome to Serve.gov
Hands On Atlanta
I have done all kinds of volunteer work, from photocopying endless piles of stuff for teachers to trail maintenance to weeding community gardens to feeding the homeless to being a gofer for a summer arts camp. I just like helping others. It really doesn't matter what I'm doing, because at the end of the day I go home feeling like I've made the world a little bit better, and that's really all I need.
Don't be afraid to try a bunch of different things--there are a lot of one-off volunteer opportunities, like park clean-ups and whatnot. Yeah, cleaning up a park or beach sounds kinda gross but I've always found it to be one of my favorite volunteer activities. There is something inherently satisfying about making litter disappear!