I took a Script Analysis class for my major, and you'd be amazed to how much it helps...even in other classes, like acting, scene design, etc., there is always talk of Script Analysis and how it relates to the design and that sort of thing. To me, calling a show is all about the feeling. You have to feel the cues and go with the flow of the show, and a lot of that has to do with you personally knowing the beats, the break downs, and the overall underlying analysis of the play. It's helped me tremendously, and has also helped me in other classes as well!