Read your notes and read out loud. If it's something you need to memorise, after you finish reading a small section over, look away from your notes and recite it to yourself to see if you remember. If you don't, then do it again. Also whilst doing this, make very brief notes with headings and bullet points so when you finish reading everything, you can go over those bullet points and say as much as you remember about each point. This way, you can identify which sections you didn't quite elaborate on and study them again. For me, writing is a lot more helpful that typing or reading notes on my laptop. Hope that helps!