Ask HN: How do you keep notes while learning?

Hello HN, While learning, watching online courses, reading books I would love to keep notes in a way that I can easily access later to recall and improve. When I don't take notes, it does get overwhelming after few hours of study. I have tried Cornell notes method, writing down notes in a notebook and Evernote but with notebook writing, it can be hard especially if I'm reading or watching on my laptop.

In other words, what's your procedure for better learning and information retention?