In reading your sources be sure to remain aware of the author's qualifications, the nature of the audience the author is speaking to, and the usefulness of the source for answering your question. Review the Evaluate Your Sources Guide.
Use your sources in a transformative way. Try to summarize instead of paraphrase. Avoid collecting bits of pieces of information that seem to support your existing idea or opinion. Look for an answer to your question that you haven't thought of yet. See Deep Reading and Note Taking.