I used to do the 24-Hour Short Story competition: write a short story using a given prompt, with a word limit, between noon on Saturday and noon on Sunday. There’s a new contest once per season. I won an honorable mention a time or two.
It’s sort of like a NaNoWriMo in miniature, but without the group sessions and cheerleaders.
If you like to write fiction but you tend toward verbosity, fuss over things for too long, or sit there with terrific words in your head and nowhere to go with them, the enforced discipline of this contest is great exercise. You might also find that a story dashed out in 24 hours can evolve into something much longer, more solid, and more polished. One woman I know turned a contest entry of hers into a novel.