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Dave Gray created this informative 5 minute video; Some basic rules for napkin-sketching (RSS readers may need to open post to view). The video shows easy-to-remember principles for creating visual language (merging words/numbers with shapes and images).
My colleague and I have been pushing ourselves to always include a drawing in every meeting, especially when the conversation starts spinning. You will be amazed how sketching can make complex ideas understandable. This video may also inpire A3 authors to make things more visual.
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