I am using OneNote, and have had a lot of ppl ask me about it. If I have a good outline I do not take many notes. If a professor talks about a topic I have in my outline I put a special bullet next to it just to confirm it is important to the prof. I also sometimes write definitions in a prof's particular wording in an attempt to impress them later by quoting them on an exam. If I am taking a lot of notes I know I missed something important in the reading, and try to go back through it later.