The best way is to practise and keep on practising. Thats not a big answer but even quant for that matter needs practising. Anyways, a thorough work out of OG11 will do a world of good for GMAT, both V & Q. Other materials would be kaplan, manhattan... Check in sites gmatprep.com, pagalguy.com etc..., they provide plenty of prep stuffs and you also have forums which will guide you in more than 1 ways..
Cheers, Best of luck!!
Cheers, Best of luck!!
