Here is an interesting work by James Thomas .
"I went to a talk on sketchnoting a few weeks ago and decided to try it as a way of changing how I listen to talks.
I usually write loads of notes, but I wondered if I could learn to write less. Having to wait until I know what to sketch is stopping me from writing (although I'm still finding the temptation to write hard to resist just now)."
You can find more adout James work on his blog.
Thank you James