Dave Gray’s thriving firm, Xplane, introduces businesses to “visual thinking”:
Visual thinking is a way to organize your thoughts and improve your ability to think and communicate. It’s a way to expand your range and capacity by going beyond the linear world of the written word, list and spreadsheet, and entering the non-linear world of complex spacial relationships, networks, maps and diagrams.
In other words, it’s infoviz (which is usually based on hard data) plus sketching, mind-mapping, flow charts, symbols and more.
Gray has uploaded nine learning modules on the topic at his Visual Thinking School; though breezy and charming, they’re less useful as how-to lessons than as a further reminder of how instantly and powerfully images can convey information. (For examples, see especially the Visual Mapping module.)