How Useful is Tufte for Making Maps?

John Krygier wrote "I sat down one day and made a list of Tufteisms from the book" ... leading to "20 Tufteisms from The Visual Display of Quantitative Information"
which he then distills down to six commandments.

As someone who has three of Tufte's books, this is quite interesting. Another aspect I liked in the books was the frequent use of some fine (and a few bad) maps as examples of points in the text.