A few weeks ago I read an article by Kathy Sierra on Tablet PC's and Mind Mapping. I had only seen the technique used once before, by one of my colleagues, to organize the topics for a meeting. I thought it looked neat, but as attending or organizing meetings isn't one of my day-to-day tasks, it didn't stick to my mind.
Kathy Sierra however, is quite good at rousing enthousiasm, so I downloaded an open source mindmapper, FreeMind. I played around with it for a while, and then I got the idea to use it as an aid in extracting some structure out of a myriad of bussines rules summed up in Use Case documents. So far they've been a great help, seeing as on the project I'm working on now, there's a vast no man's land between the Use Cases and actual coding. Oh, and they look hip too. Too bad I can't post any screenshots, as the content is confidential, but there are plenty on FreeMind's Sourceforge page.