I agree, the IMC confuser is the thing to get. If you can do all the questions in that, you won't go far wrong. As has already been mentioned, quite a lot of the test is based on filling out a plog. The papers are written with a particular edition of the chart so your club should give you the old edition of the chart. They all seem to be based on the Southern England half million, so if you live in the north and not familiar with the southern chart it may well be worth asking your club and mugging up on it.
Good Luck.