My advice is get stuck into Tort straight away and try to get a good few topics done while your will is strong! Its a really long course, so the sooner you start the better. I used McMahon & Binchy, but had to skim at the end....
The key with these exams is to try to cover all aspects of each subject and not just those which would have been guaranteed questions in college exams. The level of detail required is not the same, so don't panic about not being to discuss cases at length.
Look at the past papers & how the questions are phrased, bearing in mind you have to do 5 in three hours. I don't hink anyone can really predict these exams and what topics, but looking at the apapers can motivate you to get 'X' amount of the course doen til you recognise every question.
The exams are tough, but if you put your head down now and try to stick at it, you will be ok.
Best of luck