Finding the best criteria for your evaluation: In order to do this kind of writing well, you need to determine what sort of a topic you are evaluating. If it is a movie, then what genre is it: horror, romance, drama, etc.? Then you need to decide what would make an excellent movie in that genre in your opinion. For example, you may decide that a good romantic comedy has to have three things: humor, surprising plot twists, and actors you enjoy getting to know. Next, you will evaluate the movie you have chosen to see how well it matches those criteria, giving specific examples of how it does or does not fulfill your expectations of an excellent romantic comedy.