Practice is essential, but I also think you need a solid strategy that works for you. I feel like when students take notes, they often summarize or write down details from the passage. I suggest avoiding this whenever possible.
Try to write down the function of each paragraph as an infinitive verb (how each part fits into the entire thrust of the author's argument...to introduce, to refute, to explain, to compare, to describe, etc.). It really helps with those pesky Logic questions ("The primary purpose of the second paragraph is..." etc.)