[@Dark Cloud] I didn't either, so, I started with the basic questions. Answer those and you'll get a tiny idea on where to begin. 

Where's my character?
How does the place look like?
Why is my character there?
Who are my character's friends?
Are they there? Yes? How do they look? No? Is my character meeting them or they come over?
Then at the end write something that can give you an idea for your next post.