One suggestion I would add to what everyone else has said is to not worry too much if you can't memorise all of the case names exactly. You'll get more marks if you can remember (and apply) what the law says but have forgotten what the case was called, rather than the other way around. Focus on memorising exactly what the law is on each point you have to revise, and then work on the case names once you've done that. Obviously there will be a key few that you'll need to memorise - stuff like Donoghue v Stevenson or the Wagon Mound for tort, for example - but for most it's not crucial that you remember exactly what it's called; the examiners may well give you credit if you can only remember a partial name or a set of facts.