Where to Start
Reviews of recent, popular films are not hard to find online, but if you need more ideas, try the research databases that include popular materials, or the suggestions under Web Resources. Also see the recommendations of popular magazines and reviewers under Selected Film Journals.
For longer or academic reviews, search the research databases that include scholarly materials, or check out the recommended print resources (specific journals and collections).
For reviews of older films, try the print collections of reviews, or a research database with historical coverage.