Five composition rules, and the one that earns you the right to break them
'Cut your image into thirds, both horizontally and vertically.'
Rule of thirds first, called the holy grail: subjects sit on the vertical lines with the eye on an intersection, with looking room in the direction they face and headspace that neither wastes the frame nor crops the head - though in a dramatic close-up it is better to crop hair than mouth. Symmetry is the licence to centre, because the eye finds it pleasing, and it can be manufactured as easily as adding a second desk lamp; it suits talking-head teaching because it removes distraction. Framing means level lines - 'having tilted frames can disorient your audience' unless the Dutch angle is deliberate - a filled frame with no dead space, and natural shapes used as a border. Then composing with purpose: know why before you break a rule, as in shrinking a subject in the frame to say loneliness. And clean the actual room before rolling.
Five rules that raise the floor on every shot, none of which cost anything.