I just found a worn-out notebook from a session last year on the topic of education in Tanzania at the British Council in Dar es Salaam, where Rakesh Rajani gave four pieces of advice.
Read fiction. Minimum a novel a month. It stimulates your imagination. It makes you travel to places. It makes you dream. Engage actively in the media. Call a talkshow. Write a letter to the editor. Take a stand. Do something. Start at home and with your neighbours. Improve your own space. Start with yourself and your home. Engage in the educational system. Join a school committee or something else. Just don't sit back.
These pieces of advice were targeted a predominantly Tanzanian ordience, but I believe they count well for the rest of the world, too.