I did my PPL exams under the old system a couple of years ago, so can't give you much feedback there. Maybe it would be worth looking up "Green Skies" magazine on facebook. If I understand correctly, they are bunch of Irish teens who are going through the training at this moment and have decided to put together something they call "for Students by Students"... or something like that... send them a message, see if they can give you any feedback
as for the tips, really - repetition is the key, I practiced a lot with airquiz.com, there are other tools out there, like PPL cruiser etc, so pick one of those QBs to get yourself going.
Best of luck!