GMAT Strategy

I have taken my GMAT once with a paltry score of 600. I was doing good in GMATPrep and Manhattan tests, averaging around 700. Scored bitterly in Verbal section.
I am taking it again this year and have given myself a period of 1.5 months to prepare since I already am aware of the syllabus and course materials.
Any suggestions on:
1. Whether taking GMAT again is going to effect my prospects, considering both my scores will be available. Do all the Universities consider both the scores?
2. Am I taking enough time for my preparation, or should I get myself more time?

Any suggestions anybody?

1) Only two scores won't negatively impact your application - the vast majority of GMAT test takers take the test twice. Most universities will consider your highest score.

2) No one can tell you if 1 month is enough time to prepare. Jumping 100 points in a month is difficult, but it's been done before. I generally think people shouldn't schedule their tests until they are regularly (ie, on at least 3 consecutive, FULL-LENGTH [including AWA] practice tests, scoring at or above their target). You have to do what's right for you, no one can answer whether you've given yourself enough time to study.

That helps like anything.
Thanks a lot.