First off, google Voxengospan, provided you have a vst host. It's a freq spectrum analyzer, free.
Second, there are no rules when it comes to EQ. There are no 'magic charts' which will tell you how to make your tracks sound awesome. Use your ears, and use the EQ only to cut away frequencies (you get better with experience). If you want one instrument to stand out, instead of boosting the shit out of it and making mud, give it room by cutting the other ones. Give the instruments room to breathe instead of making them fight for dominance and suffocate each other.
That said, for some reason I find it easier to get a good mix in R3 without a spectrum analyzer than in Live 5 or Cubase. Not sure why, but I thank the props for it

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