What is the plot of your story? What kind of events will occur?
How many characters will you have? How old are they? What do they look like?
Describe the setting of your story. When will it take place? Is it in a house? Is it in a city or a town? What does the area look like?
Set the mood of your story. During what time of day or year does it occur? How is the weather? How are the characters feeling and acting?
What is the main idea or message of your story?