I'm one of those writers who tends to be really good at making outlines and sticking to them. I'm very good at doing that, but I don't like it. It sort of takes a lot of the fun out. ↗
The short story is still like the novel's wayward younger brother, we know that it's not respectable - but I think that can also add to the glory of it. ↗
Write your story as it needs to be written. Write it honestly, and tell it as best you can. I'm not sure that there are any other rules. Not ones that matter. ↗