You may want to review those previous articles.
Also known as mind maps, these tools are simply a way to visualize a concept.
Concept maps are diagrams that related different elements of a concept to each other and/or to the main idea. These diagrams can be simple or complex—depending on your own style of learning and what helps you understand the concept.
If you haven't bothered to learn about them before, you may want to reconsider this powerful tool.
Recently, I added this video to my page on Concept Maps found in the Lion Den Study Tips & Tools.