Is there one secret for success when writing stories? Yes!
Just as the secret in retailing is location, location, location, so the strategy for enduring success in fiction writing is Structure! That seems odd if we consider that real life has little or no structure, other than that imposed on us.
We need a sense of form in our lives just as we need food. It seems to be engrained in our genetic structure. The perception of form creates meaning, all by itself. If we look at a flower, a miracle of structure, we infer a sense of meaning in its creation.