Take a look at what you do remember easily, and then game your note taking process, so that you add that stimulus/reward to your note taking. Maybe it's paper, maybe it's a computer, maybe it 's a fountain pen. Maybe you're like me and your retention is better if you're fully engaged and not taking notes. I see notes as some see a camera. You're so busy trying to transcribe what you're seeing, you're not fully comprehending it till later, and that's only if you're good at notes, otherwise, you now have a dumbass teaching you when you could have been listening to the litteral expert in their field explain it, paying better attention and understanding it; rather than memorizing it. Once you understand it, you're not memorizing, you're explaining. But that's just how I work. Find what works for you.