(From Wikipedia) A mind map is a diagram used to visually organize information. A mind map is often created around a single concept, drawn as an image in the center of a blank landscape page, to which associated representations of ideas such as images, words and parts of words are added. Major ideas are connected directly to the central concept, and other ideas branch out from those.
Mind maps can be drawn by hand, either as “rough notes” during a lecture, meeting or planning session, for example, or as higher quality pictures when more time is available.
(from Joshua) Mind mapping is where you start at a core idea and start thinking about systems and ramifications that go along with that. They work well for visual learners but not so much for auditory learners. They can show the bigger picture in a flowchart type layout. If you are more auditory you may be more inclined to use bullet points or lists.