I think there simply comes a point at which you're beating your head against the wall with revision, when you're making something different but not better. For me, revision usually has more to do with making the language prettier, finding clearer images, using more active verbs.
Mary J. MillerI've learned a lot about language from reading slush. You can immediately tell if a writer is in control of the narrative. This writer will avoid using too many words like "possibly," "probably," "maybe," "perhaps," etc. He/she will avoid using clichรฉs, as well as a lot of metaphors, and won't take four sentences to say what they could in one (or write a great sentence and follow it up with a bunch of stuff that just weakens it).
Mary J. MillerI don't revise a lot when writing short stories. As far as the novel, I definitely thought more about plot. Honestly, I'm still pretty confused about what "plot" means. I've been reading some of my Goodreads reviews and one reader noted that the The Last Days of California "reads like a short story stretched to the breaking point, padded and brought into novel range..." I don't know what people want, really.
Mary J. MillerThere were definitely scenes I struggled with more than others: the car accident and the thunderstorm are two that come to mind. It's difficult to write about a thunderstorm. There are only so many ways to describe it and our vocabulary is so limited. And the car accident scene required a tense, manic quality that had to be conveyed in the language, as well as the character's dialogue and actions. I was editing these scenes long after I thought I was finished with them.
Mary J. MillerThere are many stories I've wanted to write that I'm simply not able to - sometimes I haven't found the way in yet, and it doesn't matter how hard I try.
Mary J. MillerI think training your instinct comes from writing and reading. There's no big secret. And reading slush helps, as well; I'd recommend everyone edit a literary magazine at some point. It's time-consuming, but there's a lot to learn from other writers who are also learning. The patterns (twelve stories about whales in this batch?) are also interesting.
Mary J. Miller