Arvind Kejriwal has been at the heart of an inspiring campaign to combat corruption by using the right to information. He spearheaded a campaign in Delhi along with many other groups that popularised the use of right to information. Arvind got the Magasassay for his work. The videos below contain a talk he gave on using RTI, which I think is a good introductory material for people with an interest on how it could be used, and what it means.
Good introductory video on using right to information to combat corruption by Arvind Kejriwal