hey i am also preparing for gmat, i scored 380 in my first attempt because i wasnt aware of what gmat is?? i just go through with sat math portion without any information regarding time management and its importance for gmat? i will repeat my gmat in next 3 months, this forum is very important as it will help u to understand how to fix ur problems and how to beat gmat, i will suggest you few books and they are really great
1) MANHATTAN GMAT,
2) OFFICIAL GUIDE 10TH, 11TH, 12TH AND 13TH EDITION,
3) KAPLAN,
4) PRINCETON REVIEW,
5) AND GMAT BIBLE
i wasnt familiar with these books when i first appeared for my gmat, english isnt my native language and i faced a lot of issues in verbal section...however, i have improved a lot after reading manhattan verbal guide and english grammar by wren and martin, still working on few issues..i havnt started math preparation, just focusing on english for at least 2 to 3 weeks..good luck for ur exam