Work with an organization, such as Amnesty International, that brings to light the cases of political prisoners like Ai Weiwei.
Learn more about Ai Weiwei and his struggles for liberty and free speech. You can find out about current efforts at http://www.friendsoffreeexpression.com
Together with your local library, create an art exhibit and speaker series focused on free speech and/or the role of a free press in a democracy.