Do a general Google search over your research question/topic and read newspaper articles and other dot-com websites. Be aware that some of these sites might be VERY BIASED. So make sure you read both sides of the debate!
Read about your topic on Wikipedia to understand it fully.
Read and annotate the PPT over “Creating Thesis Statements”
Answer your research question with your stance on the topic. That will be your working thesis. Do not include your reasons in your thesis. They belong as the topic sentences of your body paragraphs!