A Mind Map is a graphic tool used to visualize your thoughts and ideas. The central image/idea is at the center of the map with related concepts branching out. You can use a mind map as a visual form of brainstorming. Make your own using MindMeister or Bubble.us, or draw one on paper. You can also search for a topic in Credo Reference and view premade Mind Maps. Just change the drop down menu at the end of the search bar to "Mind Map."
See a Mind Map from Credo below: