#8: Check the cataloger's work on non-English materials
Most public libraries shelve their movie collection by title. If you have a collection of movies in a language other than English that is supposed to follow that convention, find out how to say “the” in that language, and make sure all your movies aren’t shelved under “The X” instead of “X” because someone couldn’t read the language they were working with. For example, in Spanish “the” is “el” or “la” (depending on the gender of the noun). You may find a lot of movies in the Es and Ls that don’t really belong there.