180 and 30 degree rule.

This is a rule wherein the camera must stay on one side of the object/scene so that it is easy to watch for the viewer. The 30 degree rule allows you to seamlessly create a larger interpretation of the scene. For example, if you were to shoot someone standing under a tree eating a sandwich, you could start off with a close up and then move 30 degrees and have a long shot. It makes the scene much more interesting.