Where to start from?

For me a story will just pop into my head, and then i will think about for a long time and then begin to write. Im not gonna write anymore screenplays for a while, one reason is that i can never finsh, the other is that i dont know enouhg about movies and how they work, how to make a situation more dramatic, how to use dialouge to progress the story, etc.



By the way, whats Odd Tom about?