If you have an iPad, take a look at the Rod Machado series - great for radio nav stuff. There are also lots of cheap apps for things like hold entries, VOR/NDB simulators, etc. Search for 'IFR' in the App store.
But, before you finish your IMCR, the most important advice is to plan a couple of decent trips with your instructor, to the point where you are then happy to go places in IMC, within minima of course, by yourself. The biggest IMCR myth is that it is only a 'get you down when you get caught out' rating. If you don't do some real world trips in solid IMC (clouds, not a hood!) with your instructor, you'll never dare do them by yourself afterwards. That means no currency and you won't believe how difficult it then is to use your rating in emergency. Fly IMC at least every six weeks, practice ILSs alone, otherwise there's no point in the rating. Don't become one of those with the IMCR that only do it for their renewal - pointless and potentially dangerous.