Source Assignment. Find a letter to the editor, opinion piece, or blog post that takes a stand that you disagree with. Write a response to that piece, countering its points, presenting your points, and supporting them with evidence. Be sure to cite the other piece, and identify any quotations or summaries from it. Decide which audience to address: The writer? Readers likely to support the other selection? Readers with interest in the issue but without loyalty to the original publication? Some other group?