Ever since The Back of the Napkin appeared, people have been asking me for download-friendly versions of the key visual thinking tools I introduce. So due to popular request, here they are; high-resolution PDF files for:
The Visual Thinking Toolkit. (A visual summary of all the lessons in the book.)
The Visual Thinking Codex. (The master checklist for creating any problem-solving picture; a combination of the SQVID and the <6><6> Rule.)
The SQVID. (The five questions that get your mind's eye kicked into gear.)
The <6><6> Rule. (The six ways we see mapped to the only six pictures we need to be able to draw.)
For anyone who asked for these -- THANKS. I hope they're useful for you.
If you don't know what these charts mean, let me tell you about this book I wrote... :-)
UPDATE: These tools can now be downloaded at my website: www.thebackofthenapkin.com