Many students begin with a ‘mood board’ along these lines: a collection overlaying images, materials and text. This example has string and other items connecting different parts. This could then be photographed and annotated further.
Drawing a mind map over blurred and running watercolour forms can result in an exciting abstracted diagram. As mentioned in the above example, colours that link in with the subject matter should be chosen (muted, softer colours are usually more appropriate than psychedelic pinks and greens, for example).
In this example, numerous small images have been cut out and arranged, accompanied by annotation. Colours have been positioned carefully, so that the final image appears balanced and cohesive (rather than busy and chaotic).