Hi Carpenia! Here are my suggestions for the RC, even though you must consider that I'm definitively not a native speaker, so what I really had to concentrate on was the vocabulary.
1) I read the passage altogether, trying to do it as if I were reading an interesting book, just forgetting about the test.
I know many people say it's more useful to just skim it and to go back and localize the useful information after having read the question. This does not work for me: many questions really need you to grasp the whole meaning of the paragraph, so just skimming it is not enough (even worse, I have the feeling they put trick answers that you tend to choose if you do that).
2) Practice some of the official material, but I wouldn't waste much of my time with other (expensive) stuff: the offical ets guide gives you the right feeling of the kind of questions you are going to be asked, and that, I think, is enough. Again, questions focus more on generic attitude of the writer than on facual or nonfactual information.
3) This is not specifically related to RC, but it is indirectly: when you are taking the actual test don't spend too much time on analogies and contraries (even though, again, the opposite is true when you are preparing!). If you don't know a word, make an educated guess and go on; if you feel like you got it, read all the possible answers just to be sure, then click and forget all about it. By doing so, you'll have much more time for RC, which in the end constitutes the vast majority of the test.
I know these are definitively no deep insights, but - again - RC was not the part I had to concentrate on, so I just tried to rationalize the way I prepared for it (I think I did pretty good on that, 'cause I surely got many vocabulary questions wrong). Hope I've been helpful.
Also, thank you KINDAM for your help!!
G