Hey, we're almost done! You're probably deep into the final confrontation by now, but have you considered a final twist? Sometimes a story can feel too straightforward and predictable. If you feel that might be the case with yours, it's time to do some brainstorming.
First, it's a good idea to map out what the reader expects. If you were reading your story, what would you expect? Once you've jotted that down, come up with ten more alternatives. They don't have to make sense, you're just brainstorming.
Got your list? Okay. Cross out all the ones that are too outlandish. Surprising but inevitable; that's what we're going for. You want a twist, a reversal that surprises the reader, but it has to work for the story. Now consider your original ending. Does one of your new options have more potential?
If you do decide to add the twist, take a moment to explore the idea. Does it work as is or do you need to expand on it? Do you need to add foreshadowing so the twist makes sense?
Your twist still feels like a good idea? Okay then, twist away! And remember, in writing, you get as many do-overs as you want; if the twist doesn't work, you can always cut it.