Well when you were in school how did you study. I just find this topic intresting 'cause.....
well i do it like this...specially for chemistry
1. pick up the book (of course)
2. see the thickness of chapter
3. count the number of pages
3 start reading
4 after completing 2-3 pages i just relax for....
5. after then i read skip every 3rd or 4th paragraph