Hi chaitanya87,
I am happy to provide some suggestions about how to best prepare for your next GMAT, but I have a few questions for you.
1) What is your GMAT score goal?
2) Can you provide us with the dates and score breakdowns from your Official GMAT prep practice exams? When you took the practice tests, did you take them under realistic conditions (e.g. in a quiet environment, no extended breaks)? Did you complete the entire CAT, including the IR and Essay sections?
3) Can you describe your study routine? What resources have you been using to study? How many hours a day did you study and for how many total months?
4) For your retake, how many hours a day can you commit to studying? How many months do you have until you take your next GMAT?
5) What are the MBA programs to which you plan to apply? What deadlines are you targeting?
6) Are you open to applying second round?