The Trevor Thom book 5 is a start. It basically comes down to this:
1) Full Instruments straight and level, turns, climbs, descents.
2) Partial panel, straight and level,turns, climbs, descents and unusual attitudes (don't eat too much breakfast!!)
3) VOR and NDB tracking (NDBs are tricky customers!)
4) Holds
5) Non-precision approaches VOR/NDB (with and without DME)
6) Precision ILS approaches
7) Missed approaches
That is about it really.
Sample exam questions are in the IMC Confuser available from your school no doubt...however beware! There were many questions in the exam not in the confuser! My pass was marginal saved only by the fact I had read the text.