Flash fiction, which generally refers to short stories under a 1,000 words, pose an enjoyable challenge. You need to work within the tight limits on length to create a memorable story.
If you want to learn more about the different possibilities for flash fiction, I recommend Brevity: A Flash Fiction Handbook by David Galef.
The book introduces you to different types of super short stories, including character sketches, vignettes, letters, lists, and what-if scenarios explored briefly and powerfully. It offers advice for strengthening your writing, and each section comes with its own writing exercises or prompts. Plus, it serves as a story anthology (with Steve Martin’s “Disgruntled Former Lexicographer” as one of the highlights).