Most people read (and not study) practice manual only. They consider reading is like studying. No dear friend reading does not mean studying.
Convert study material into your own style:
Read the paragraph and convert it in to small sentenses as per your capacity to digest it. Give efforts to tell your brain what the paragraph wants to say. Our brain dont understand the new concepts immediately we have to convert technical language into our own style language so that brain quickly store it.
compress the study material to level zero. :
take a paragraph after converting it in to simple sentenses, compress it into minimum possible information which is to be told to your brain.
whole 800 pages book can not be stored as it is in our brain, we have to compress it in our own style.
if you read only PM then it will not help you. first clear concepts, compress them and then go for question answers.