Hi Archana!
Great question! I think the best thing to do is a combination of more practice and more reading. Let's talk about what you can do to expand your practice first. You should continue to work through the OG problems. Plan on working through all of the problems at least twice. This is a great way to test your self and see how much you have improved. But wait some time before attempting the questions again.
Spend more time going through the answers and the explanations than you do working through the problems. Even for questions you get right, you should take the time to read through the text explanation to make sure you answered the question correctly for the right reasons. Also, you will learn about common traps and certain patterns to look out for in future questions and passages.
Finally, if you want even more challenging practice problems to work with, I recommend turing to LSAT prep material. The LSAT has a reading comp section and the passages tend to be the same as the passages on the GMAT. Also the questions are similar to the GMAT as well. This is a great way to expand your practice and find new passages.
Now let's talk about reading in general. You should be reading everyday material that is similar to what you see on the GMAT. That means, read The Economist, The Financial Times, or The Wall Street Journal. These are highly regard news sources that people in business read everyday. If you are headed to business school you should be reading these too.
Lastly, you need to practice focused, active reading. You need to read like your life depends on it, like a hungry bear waking from months of hibernation. You need to read with purpose. One way to activate your reading process is to ask yourself a set of questions every time you read. And ask yourself these questions multiple times as your reading. The answers may change as you read. So ask yourself:
1.
What is the main idea? You should be able to put this into a couple phrases, not necessarily a long sentence. Try to start at the broadest possible level and then narrow more and more. So start with the general topic, then try to figure out what the scope of the passage is. That is, if the passage is about dinosaurs, what part of dinosaurs are we talking about? Skeletons? Fossil records? Biology? Coloring? Why they disappeared? Relationship to modern day birds? Through this process you should be able to narrow and narrow until you have a good summation of the main idea.
2.
What is the structure and flow of the passage? You need to pay attention to transition words in the passage. You need to think about where you have been and where you are going in the passage. How does this paragraph connect to the main idea? What's its purpose in terms of the main idea? And how was it connected to the previous paragraph? Through these questions, you will get a "road map" of the passage. You'll have a sense of what happens where. And you will have a better understanding of examples or reasons because you will know their purpose in terms of the main idea of the passage.
3.
What is the author's tone and what is the author's purpose? You always want to try and infer the author's opinion about the topic. The author's opinions and beliefs will leak into the passage and influence the word choice and position in the article. So pay attention to the positive or negative tone of the adjectives and adverbs in the passage. In terms of the author's purpose, we don't have to do too much work. There are really only four reasons that people write something: to entertain, to persuade, to inform, or to describe. Obviously, passages will have elements of all of these, but usually there is one main reason that author sat down to write what you are reading.
I hope that I've been able to help!
Cheers,
Kevin
