If you feel like you are running out of ideas, you are probably trying to create too many stories.
One story can be used more than once.
You can tell it from different angles. Focus on the mistake one time and the lesson another time. Keep the core the same and adjust the emphasis.
This approach saves time and builds familiarity for your audience.
The takeaway:
Reuse is not repetition when the perspective changes.
A single clear story can support more content than you think.