You should start off by limiting yourself because it's easy to get in over your head once you start down the path of unpaid work. I volunteer 20% of my time (on

You should start off by limiting yourself because it's easy to get in over your head once you start down the path of unpaid work. I volunteer 20% of my time (one day a week) to non-profits so they know what they're getting. Most of the jobs I got at first were through volunteering in other ways. I was a driver at a summer camp for underprivileged kids when I found that they needed a registration system they couldn't afford. And an animal shelter where I used to walk dogs had a little gift shop that sold handmade items so I set up an online store and their revenue went up 800%. Little projects like that can make a huge impact with little effort. Then I blogged about the projects and now I regularly get requests through that. There are a lot of NGOs searching online for people like you so all you need to do is make yourself visible.