I can highly recommend the heinmann revision guide. That's all I used to revise for all level 3 exams and got destinctions. Also gn3 is probably my most read book too. Good luck in your exams mate
Make yourself a cuppa, sit back, do a 302 search in the student section here and start reading through, there is loads of info on here to help you get through your exams and if you do get stuck dont be afraid to ask, we have the friendliest and most helpful bunch of guys on here.