Brainstorm your ideas (what can you see, hear, touch, taste, smell and feel).
Plan your writing (Who are your characters? What is the setting? What is the problem? How will your story end?).
Write a draft (no more than two to three pages is needed to tell a gripping story).
Read your writing aloud on your own, check that it makes sense.
Read your writing to look for any mistakes you could fix up on your own.
Read and show your story to an adult to enjoy.