Designed by Tony Buzan in the 1970s, this is a very useful way of collating psychological material. This video demonstrates how to create a 'mind map'. I use them all the time as a writer to organise the information for my feature articles. The most simple for is a spidergram, which has been available since my childhood days.
For more information about mind mapping, visit: http://www.largescaleinterventions.com/documents/mindmapping%20in%208%20easy%20steps.pdf