The creator of Scrivener also developed Scapple as a way to visually plan a project. I’m experimenting with it to see if it helps me visualize what needs to be done and when. I plan to take image snapshots of it as a chronicle of the process along the way. Scapple lets you use it for 30 days (actual days of use, not days from download..nice) before you buy.
Here is my first snapshot.