Something out of the line of regular mapping software this week: Crystal Mapping, with free or premium options.
This works in concentric circles and allows each circle to be subdivided. That produces a strict hierarchy, with each sector associated with a parent that is the sector of an inner circle that it touches. Sectors are dynamic and accept links, notes and attachments. Like many things, its so much easier to understand by seeing it rather than reading a description.
Crystal Mapping is an on-line application that can be run in a browser, but if you pay £30 for the Premium version, there’s a downloadable application (Adobe Air) that lets you run it off line.
See if its different format introduces a different way of thinking – it’s worth a try.