I don't take notes either. Partly because I can't listen and write at the same time, and even more importantly because they simply do not help me remember anything at all.
Sometimes I hear something I know is going to be important, only have time to write down a word or two so I can hopefully recall the details, then read them afterward and can't figure out what the hell it was supposed to remind me of.
Notes, for me, are worthless.
If I can't remember information just from listening, then I can't remember it. It's that simple. I can only remember what I can remember, so I just listen, and try to create images of what's being discussed.
Lectures are a bad way for me to learn because of all this. My brain works far faster than any speaker can speak, so it's all over the place during the lecture. It is what it is. Why bother concerning myself over it? I'm better off attending lectures, then looking up information about the topic on my own afterward. Doing that often sparks subconscious memories of things the speaker covered, and that works far better.
Also, if it's possible, If the lecture material is highly important, I will ask for copies of the speaker's notes. You'd be surprised how often you can get them.
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I'm not likely to be around much longer. As before when I first signed up here years ago, I'm finding that after a long hiatus, and after only a few days back on here, I'm spending way too much time here again already. So I'm requesting my account be locked, banned or whatever. It's just time. Until then, well, I dunno...