Hi Sumit,
Have you taken any GMAT mock tests after Feb? Well, here is the deal with GMAT, just studying is not going to help you get to the 700s. Also, After the first attempt at the GMAT, you might have a fairly rough idea about your strength and weakness on the GMAT.
I suggest that you first take a GMAT mock test and see where you stand right now! Your scores will give you better direction on planning the GMAT journey ahead.
Here are a list of basic GMAT strategy videos that you can refer to:
1) How to Manage Time on the GMAT
2) What are the best materials to use for GMAT prep
3) How analysis is a key to a great GMAT Score.
You can view the videos here:
https://gmatonline.crackverbal.com/Also, make sure that you analyse all your practice questions. Maintain a detailed
error log that helps you avoid committing the same mistakes again. Don't worry much about the quantity of questions that you solve - look at the quality. If you are able to eliminate answer choices for the right reasons, then you have already won the battle half way.
But firstly - take the GMAT prep mock test! Very important to do smart study on the GMAT
Hope this helps! All the best