Back in the day, I came across a book on writing by the renowned teacher and author Francine Prose. Reading Like a Writer changed how I approached my reading. I still read for the pleasure of being immersed in a story, of learning, of becoming inspired. But now I took something else away from my reading time: techniques I could use in my own books as a writer.
Prose's book is one you've no doubt read yourself--if you haven't, be sure to!--and I learned much from her step-by-step unraveling of story.
It was a similar change in awareness that happened when I discovered storyboards and the five turning points of well-structured stories. I remember watching a film not long after my first storyboard immersion. My family grew very tired of my muttering "a perfect point #2" or "there's the all is lost moment." But my admiration for good structure and my new understanding of how writers achieved it did change my take-away from good movies.