I used to learn when I was at school, at high school, and at the University. After I've got my Ph.D. I became a project scientist, and my career required changing the subject of study every 5-6 years. Sometimes it was a slight change, sometimes it was more radical. Each new turn of this spiral required learning and almost immediate implementation of new knowledge. Intuitively, I developed certain learning techniques, which I didn't formulate even for myself but which I followed.
Closer to the subject:
it was surprisingly pleasant to listen to a conscious and nice wrap-up of these and many other techniques in this course. It's not a "magic pill" - you'll still have to work a lot, but the skills and knowledge you'll get will probably simplify your life.