My students have always loved the resource linked below. It comes from a book that is unfortunately out of print:
For the Love of Stories by Murray Suid (Monday Morning Books, 1986).
Because it was written pre-internet, there are a few bits that are outdated (how to do research, for instance). But the comic-book format and easy worksheets were always enjoyable for my students.
I would love to SHOWCASE winning stories your students write using these strategies. I am particular to creative settings and historical fiction. Email me and I’ll post them. If you can have the author add a picture for their story, that would be great!