Here is an interesting sketchnote by Chiu-Ki Chan .
I was intimidated by sketchnoting because I can only draw very few things. But it got much easier once I look at it through an engineer's eyes. I phrased it as a constraint satisfaction problem, to express ideas with a small toolbox. And as an engineer, I am extremely good at that!
You can find other Chiu-Ki works on her blog.
Very interesting, thanks for sharing Chiu-Ki!