The document discusses several common conventions used in thriller films, including low-key lighting, shadows, quick cuts, dramatic camera angles, flashbacks, and black and white cinematography. Shadows and quick cuts/obstructive editing are used to create tension and suspense by disorienting the audience. Flashbacks provide backstory that may be important later and help create an unsettled feeling by mixing timeframes. Black and white photography can also convey past events and enhance shadows and suspense. Examples like "Psycho" effectively employ some of these thriller conventions.