Use Post-its. Many years ago, I read an article by the author Michael Ventura in which he talked about writing bits of scenes and dialogue on Post-it notes and putting them on one wall of his office. As he used a bit, he moved it to the other wall. He could also easily stand in front of the wall with the notes to see where he might go next, and move ideas around, physically. Being able to step back and take a long look at your ideas can help tackle difficult organizational issues.