I just read what is essentially a scene-by-scene analysis of Star Trek VI. It was quite interesting to read, because it examines the film in a way that I never have. This is my favorite Star Trek film, I have watched it many times, and I have long admired it for its economy of story telling. Every scene has a purpose and keeps the story moving, and that means there is never a dull moment. However, when I read that analysis, it shows how much painstaking effort went into making each scene as effective as possible.
This makes me think about how to refine a screenplay the same way. Each scene should be studied, improved, and perfected. Intensified. Extraneous stuff should be removed.