Greywolf once had a dream about a dusty old mansion and creepy antique dolls. He wrote out all of the dream that he could remember, and lamented that he didn't know what happened next and that he always felt wrong writing the endings to his dreams.

So I wrote a story that started with the dream and then told the rest of it.

It was a lot of fun, actually.

And yet Daniel is right, too: You can do it. Just make it up.