Mind maps allow associations and links to be recorded and reinforced. Mind maps use just key words and key images, allowing a lot more information to be put on a page. Because mind maps are more visual and depict associations between key words, they are much easier to recall than linear notes. Starting from the center of the page rather than top-left corner allows you to work out in all directions. The organization of a mind map reflects the way your own brain organizes ideas.
Mind maps are easy to review.
Regular review reinforces memory. Best is to try reviewing in your imagination first, then go back and check on those areas that were hazy. Visual quality of mind maps allows you to make key points to stand out easily. More information and examples can be found in The Brain Book and Tony Buzan's The Mind Map Book . This site has some good examples.