I recently had the opportunity to review more than a hundred stories in a short space of time–all from writers seeking feedback. By the time I was done, I felt like I’d had a master class on writing—I learned as much from the stories that needed work as I did from the ones that were ready. There really is no substitute for critiquing—both the giving and receiving of it.
If you belong to a group such as SCBWI or 12×12, take advantage of the critique forums. Read as many stories in a row (and the feedback) as possible—it’s like a mini slush pile. You’ll learn buckets just reading stories in all sorts of stages. And when you’re ready, return that blessing by critiquing and adding your own stories.
I remember feeling overwhelmed as a newbie to comment on the stories of other writers. I also remember feeling petrified to allow others to see my work, but my writing didn’t progress until I sought those critiques.