Today let's "cheat" a little bit. Instead of writing another completely new picture book, take one of your stories and change it up:
If the main character is a dog, switch it to a cat. If a boy, switch it to a girl.
If the secondary character is the mom, switch it to the dad or a friendly monster.
If it’s an urban story, switch the setting to the wild, wild West or futuristic outer space.
Switch the time frame to an ancient time.
Switch the season.
Dramatically change the character’s age.
For illustrators, if it's wordless add words or vice versa.
Create a completely new ending.
Chances are you'll end up with an entirely different story.