Design a snappy cover or title page for your thesis. Use graphics designing software (Adobe Illustrator will do) to integrate original fonts and pictures that make it look like a magazine cover. Make the title of your thesis into a headline. Put chapter or section headings on one side of the covers as other "stories" in the magazine. Find an appropriate picture from the Internet and splash it across the cover. If, for example, your thesis is about "Huckleberry Finn," find a picture of Mark Twain.
Conduct interviews to make the body of your thesis more magazine-like. Even if you are researching an author who is long dead, call up a professor with some expertise and get a quotable quote. If you can't find anyone to interview, you might write a section of your thesis in faux-interview format. For example, try "interviewing" one of the characters from a novel you are studying.
Punch up the language and style of your thesis. Magazine articles tend to begin with a hook, so do the same in your thesis. Instead of jumping right into your argument, describe an interesting scene from a novel, a quotation from a critic or some other anecdote that will lead into your argument, to set the stage. As you edit your prose, eliminate the passive voice and remove as much jargon as you can. Try to maintain a few distinct narrative threads that you can interweave.
Integrate structural magazine elements into your thesis. Include pull quotes by taking a small section of a quotation from an interview or text and enlarging it on the page. Use drop caps to signify the beginning of a new section. You might even include pictures when relevant with appropriate captions that explain the action.