Maybe you don't want to outline or write by the seat of your pants. There's another option, Plot Patterns. There are basic patterns in stories that become foundations for building new stories on. Some sources say there are 3 others say there are 36 such patterns.
So if you're looking for a pattern you might use to springboard your writing in a new direction browse these lists:
The Quest: Main Character is seeking some object or an abstract concept (knowledge...) Example: Raiders of the Lost Ark
The Pursuit: Main Character literally follow, chases or pursues an object or another person. Example: The Hunt for Red October
The Contest: Main Character has a rival in a struggle to see who will succeed or survive. Example: The Perfect Storm (right, the rival doesn't have to be human).
The Romance: Main Character has an obstacle to hooking up with a would-be lover. Example: Romeo & Juliet
The Revenge: Main Character seeks revenge. Example: Hamlet
The Mystery: Main Character must solve a puzzle by collecting and interpreting clues. Example: Any Agatha Christie
The Surprise: Huge twist at the end surprises the reader.
Gozzi's list of Plot Patterns looks like this:
Anything sound like your next story?