If you are a foreigner / non-native English speaker, the GMAT Verbal sections must be extremely an daunting challenge. I can only imagine taking it in one of my second languages–it would be ugly to say the least.  However, I believe my strategies for mastering the GMAT Verbal are just as valid, if not more so, for non-native speakers. 

1) Start reading more now.   The main thing I would change for foreigners is that you should probably start your intensive reading program earlier. Aim to read an English language book every two weeks, or every month at the very at least. 

2) Study formal logic , statistics, analytical reasoning and whatever other area you may be lacking.  (the stats book, How to Lie with Statistics is not just for the math section, these tricks will be used and abused on the GMAT verbal section too).

3) Study hard with the Manhattan GMAT guides along with the Official Guide for GMAT Review.