Continuity, shot composition rules like the 180 degree rule, and matching shots through techniques like shot/reverse shot are important for establishing visual flow and understanding in film. The document discusses these concepts and provides examples from the author's preliminary work and opening sequence film. It reflects on how the author's understanding of cinematography, editing, mise-en-scene, and use of titles has developed, allowing them to create a more polished opening sequence that effectively sets up genre and narrative.