SC is the easiest section to improve so definitely take advantage of that. Remember not to make stupid mistakes.
Also, business schools are not going to like a strong imbalance between your quant and verbal score. Make a strong effort to improve your verbal score. If you're a busy professional, your time is valuable. Don't waste time reading books. Start off by developing a strong foundation on how to approach GMAT exam questions. Learn where all the booby traps are and develop test strategies that allow you to answer the question correctly without necessarily reading through the entire question and all the answer choices.
The GMAT verbal is arguably more important to your score than GMAT quant as described in this article: http://www.gmatpill.com/the-gmat-pill-m ... -strategy/
Of the GMAT verbal sections, SC is the easiest to improve and RC is probably the section that will take the longest time to improve. These RC videos
Some people recommend reading the NY Times. While that may be beneficial in the long run, it's unlikely that reading NYTimes will actually help boost your score in a few weeks. Focus on keywords in the passage so you know when you should really pay attention and when you can "skim" parts of a paragraph. This is almost an art rather than a science and takes time to develop.
Remember, your time is limited so study smart, not hard.
Hope that helps! Focus. Focus. Focus.
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