Imagine a scene with a senior citizen walking into an alley in a small town. The oldster is confronted by a gang of teenagers. You can take this scene in a predictable way or find a twist to make it unique and surprise your readers – maybe even yourself.
Why is he or she in the alley? Is she or he in a disguise? Why is the gang there? What does the gang do? Are they from the small town too? Do they know the senior citizen? Is it day or night? Rainy or snowy or dry? Is this a dark story, a morality tale, a funny fable? Let your imagination fly. Then write it in with a different ending – change the narrative, change the point of view. Work those creative muscles.