okay firstly, try using a more polite vocabulary ,usually examiners don't like swearing and usually they will give you NO MARKS!
but how about you learn the advantage and disadvantages to certain issues e.g. e-commerce
and then try making mind maps on each big chapter SUMMING UP EVERYTHING!
Then do a few past papers,I did AQA BCS,and you had to really understand the case study and question scenario before you could answer the question well .Practice a few 9 mark questions and writing them quickly(so you get your timing straight before the exam)
Then look over your notes and relax the night before the exam.......?sounds like a plan....now try to implement it....:)Hope that helps...
oh and use good vocabulary and spelling in the 9 marks question.