how i start study f8 if i now stil not yet start

sir,I will attempt this Dec 2014 acca f8 sittiing, but due to the lack of concentration I does not understand what my lecturer teach about during class and her note is very less and she ask us to reading bpp text book.but until now i havent study it..and also havent pratice the ques yet i still able to pass it?Now I really need a suggestion on how should I study for Paper F8 ?because from end of September until now i study for one chap only..the other chap i still havent read it yet..and i cant remember what i have study at all..Please I need some suggestions Should I go through the whole Study text then start the rev kit or should I go topic wise? I cant seem to get things into my head by reading the study text. I feel blank after reading a few topics from the study text. Please help..pls kindly reply…thanks