Mind mapping is a visual note-taking technique that involves arranging key words, ideas or concepts radially around a central theme. It encourages spontaneous thinking and creativity. Mind maps can be created using pen and paper or digital mind mapping software. They are useful for note-taking, studying, brainstorming and problem-solving by allowing the user to see connections and patterns between ideas. Guidelines for effective mind mapping include starting with a central theme, using images and colors, printing keywords rather than sentences, and constantly revising and adding new ideas to the map.