If you can make your site into the ultimate content resource on issues related to your topic, I guarantee you you'll attract and retain a loyal audience. your site will become known as a The place for anyone who wants information on your subject. For example, Harry Knowles has made aintitcoolnews.com into the site for movie reviews and advance spoilers.
     Since you're the expert on your topic, you can evaluate sites and other resources (ezines, directories, books, offline publications) and sniff out the best ones to list along with your rating and opinions.
     This sort of content is like the old book reports you used to have to write for school. Read up thoroughly on your subjcts, then hit the high points of a topic. or, consider writing a summary of three separate article that have the same theme.