Locate the evidence
Identify the pages, captions, or documented publication details an argument uses. Distinguish those items from the critic's interpretation and from your own reaction.
Read across forms
Compare a short strip, a sustained narrative, and a visual history. Each offers different evidence about the medium and requires a different pace of reading.
Frame a discussion question
Choose a question that another reader can investigate in the same work. A precise question about sequence or viewpoint produces a stronger discussion than a general statement of approval.