Disclaimer - advice comes from someone who is yet to take the GMAT.. lol.. actually its next week. Shouldn't I be studying then? GMATClub actually helps me unwind and lets me spends some time reflecting upon how I can learn from others' thinking processes, successes and difficulties.
Get powerscore CR bible. The tone/style of the text and its arrangement may sound bit awkward, but stay with it. Go slow and read/understand every page of it. When you are done, glance through
MGMAT CR. It would be basically the same concepts presented in a slightly different manner.
Now, don't do CR from any other source other than
OG. Get the OG12 and the
OG Verbal Review 2nd edition. If you have done your PS CR, I am sure you 'll hit above 90% in
OG questions now. But, read the answer explanations for every question (even if you got it right without much effort). You 'll gain further understanding on how to avoid the moon craters GMAC digs for you.
When you are done with this process, try few RC (again from
OG or Verbal Review). I 'll bet your success rate will go up. I never used to follow note taking and active reading when doing RC. I thought I will be able to understand a passage without taking notes.
The thinking process developed in CR, combined with note taking, puts what's being discussed in the RC in a sorted format. Think of mini chambers of pieces of information interconnected via cables. The notes that I take are gibberish, I won't be able to understand if I read them afterwards. The point is that the note taking will help you understand, "comprehend" the passage. For questions asking specifics in the passage, you 'll have to read 3 sentences anyway (1 before, 1 after).
When you think that you have mastered CR, do only RCs from
OG and Verbal Review. Again checking the answer explanations even if you got a question right.
I haven't seen RC99, but
OG and VR should be more than enough to solidify your practices.
Good luck with your preparation and keep us informed of your progress.
Cheers