Effective story management involves good character development. Make your characters compelling and their arcs logical. Also, pay attention to the pacing. Don't rush or drag things out too much.
To manage stories well, you need to be organized. Keep notes on your ideas, outlines, and any research. And don't be afraid to edit and refine as you go to make the story stronger.
One way is to have a clear plot structure in mind before you start. Know where the story is going and what key points you want to hit along the way.