Mind-Mapping is a way of visualizing relationships. A concept forms the centre of a mindmap. Subconcepts are represented as branches which can have subbranches in return.
Start with writing your central concept in the middle of an empty sheet of paper.
Think of different aspects of the topic and construct the mind map.
In order to organise your concepts, create higher level concepts to order the different aspects.
Revise and annotate your mindmap so that you will be able to understand it later.
Big sheet of paper
Coloured pens or mind mapping software