hi vijay! First of all congrats on your great score!
But my buddy mNeo is right, you should pick up Richard Montauk's "How to get into a Top MBA Program" book and read it right now. It'll give you a basic guideline on how to start. I feel a bit overwhelmed too, thus all my random postings with questions on this forum lately.
But let the books guide you, read through a lot of the posts on this forum, and you'll slowly get a better picture of how you want to approach this.
Right now I just have 5-7 Word documents open on my computer at all times, with "Why MBA?" "Why Now" "Why Haas" "What are my goals", and throwing in lines of brainstorming info every time I think of something.
Talking to students and alums have helped tremendously. After every chat, I get a better idea of how to present my essays and why I have the goals I have. And this is BEFORE I even talk with students and alums in the field I want to go to (entrepreneurship and int'l biz). I can't wait to talk to those people!