Note taking worked very well for me because it caused the information to be fixed into my memory, even if I never looked at the notes again.

Taking notes on paper is far more effective, because you cannot type diagrams or equations or draw arrows, etc. The batteries never die on notepaper, they're light and easy to carry, they don't make noise, the display doesn't distract the folks behind you, etc.

Later, just run the notes through a scanner.