I have now added all the elements I think are necessary to this piece and now need to pull it all together. My favourite way is to print out an image of the whole piece, place a sheet of tracing paper on top and start sketching in details. If done in pencil this makes it easy to amend and adjust. From this sketch I can then start applying the ideas, which are bound to change but it does give some direction.
Tracing paper placed over the top of an image, and some details added.
Tracing paper lifted off the image. The details are now up-side-down.