Hi Siva,
I'm glad to see that you have adjusted your study routine such that you are learning one topic at a time. Since you only have about 11 days until your GMAT, you may consider doing focused practice to find and fix some of your remaining weaknesses.
For instance, when reviewing percents, start by reviewing your notes/flashcards on percents to ensure that you are up to speed with that topic. Following your review, practice a significant number of percent questions that cover the various concepts from that topic (percent less than, percent greater than, variable percents, percent profit, percent change, etc.). Once complete, analyze your mistakes and figure out remedies for them.
Follow a similar routine for verbal; practice one section at a time: reading comprehension, sentence correction, or critical reasoning. For example, when practicing critical reasoning, be sure to practice all concepts from that section (strengthen and weaken the conclusion, resolve the paradox, find the conclusion, must be true, etc.). As above, once complete, analyze your mistakes and figure out remedies for them.
Finally, you may find it beneficial to take a few more MBA.com practice exams. When taking those exams, be sure to emulate the test-day experience as much as possible. Take the test in a quiet environment, only take the allotted breaks, and complete all the sections. After each practice exam, analyze your wrong answers to determine remaining weaknesses and then spend some time fixing those issues.
You may find this article that I wrote helpful; it contains some more detailed advice on
how to spend your final week leading up to your GMAT.
Let us know how things go with your exam. Good luck!