Hi mimishyu,
While reading from well-written periodicals could help you to perform at a higher level on RC, it's possible that that extra reading would be unnecessary - meaning that you could potentially develop the necessary skills you need for GMAT RC in other ways that focus more on GMAT-related materials. Before I can offer you any additional advice for your studies, it would help if you could provide a bit more information on how you've been studying and your goals:
Studies:
1) How long have you studied? How many hours do you typically study each week?
2) From your prior posts, it is not clear whether you have taken any practice CATs/mocks or not? On what dates did you take EACH of your CATs/mocks and how did you score on EACH (including the Quant and Verbal Scaled Scores for EACH)?
Goals:
3) What is your overall goal score?
4) When are you planning to take the GMAT?
5) When are you planning to apply to Business School?
6) What Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich