The document discusses several common conventions in horror films, including the use of sound effects to represent the killer's presence and increase tension, the presence of stereotypical character archetypes like the clueless blonde victim, and settings that isolate victims in remote or abandoned areas where they cannot escape. It also mentions common narrative devices like establishing the killer's backstory and motivation through origin stories, the use of iconography and props to identify the killer, and unpredictable killing methods using everyday objects.