Just coming to the end of the IR , definitely great advice from 1in60 , the holds are a key element , also understand the NDB and indications in the cockpit and how to get to where you need to be (radial wise)
I had friends who have done theirs so i just picked their brains but reading up is definitely and advantage.
Remember the approach ban from air law?? get to know it its a question the examiner will definitely ask you!
Also if its a MEP/IR the book 'Multi engine piston , David Robson' is a great one to buy , £20 on play.com , cheapest i found !
Good Luck
DW