Many people write and talk about Twitter but few really understand how it can be used as powerful marketing tool for educational content and ideas. It is ideal for making the public aware of Open Educational content and building up powerful networks with organisations and groups. I have nearly 3000 followers on the 3 Twitter accounts I run and this presentation will be a hands-on, "this is what you have to do" approach to Twitter. I will also reveal some interesting stats about the effect that Twitter and other social networking sites are having on the number of users visiting OER resources. To get a taste of the talk, read my recent article in the THE website about Twitter and OER.