I'm really not very good at animagi sorting but what I usually do is read the app, usually starting with the traits and personality, and then I get a general feel of an animal group. Once I have a group in mind (fish, cats, large animals, jungle, birds, etc.) then I dig deeper into the application and try to narrow it down into a specific animal. From there I do some googling or wikipedia-ing to find a specific animal. Once I've found one, I go through the traits and such and see how well they fit the applicant. Sometimes this is easier than other times, depending on the applicant and such.

Sarah//Gryffindor//Genet