Tirien wrote: A vignette either starting traditionally or en medium res seems to be the most used. I'd like to get a better idea about how to pace a story on here with the latter.
The biggest thing to be aware of in vignette style writing is how much (or how little) an audience knows about a character or his/her situation. Never assume that a reader has read ANYthing else of yours. If the plot revolves around bits of key knowledge, then be sure to include either a few significant pieces of narrative to bring an audience up to speed, or pepper the story with clues about what readers need to know to make sense out of a character's motivations/feelings/actions. An ideal novel chapter is about 2500 words, according to Mike Stackpole. He also suggests ending every chapter with a cliff-hanger of some kind. (not necessarily a BIG one, but some kind of hook that would make a reader want to find out what happens next) So figure for this setting, you're not going to want to write anything BIGGER than that. But I wouldn't think you'll want to write anything less than half that, either, otherwise it becomes so choppy and/or shallow that it doesn't hold anyone's attention for long.
I usually write in single scenes, with one primary plot goal per story, big or small. The rest is characterization. Now, I may have several plot points which form an arc, and so they lead from one to another with little lapse in the timeline. The fundamental structure is the same though.