What I like about short stories is the brevity of room to screw up. They are grad classes of you do you, and that's a lot of fun. The story itself will dictate the approach, and on experience can teach you how to do that with your stories. It's intimate, but that's process. I've used both of your examples, dividing and using a stiffer structure. They're both viable and eminently functional.
The only approach that I would consider unworkable is deciding you have Writer's Block and getting up from the keyboard. That does no one any good.