Paintings are very good for igniting story ideas. I have just read a short story based on the shoes worn by a lady in a beautiful painting. The shoes are the starting point and the rest of the painting is featured throughout.
Try looking at paintings. Home in on a small detail and create the story from there. Your words will be like brush strokes, adding depth and colour as you build up the piece. Imagine yourself an artist. Which, indeed, you are.