That's a good list up there. And let me break your bubble: you need all of those!
The good (or bad, however you look at it) news is that you can't really change your academic performances. Your gpa is a given constant that you work with and you will not take the GMAT, say, more than 4 times max. So, your scores will stagnate somewhere and that will be a reflection of how you perform on the standardized test.
I'd also say those items in the list are not mutually exclusive. That leadership component underlies things you do professionally and things you do as part of community service and things you did in your undergrad. Also, personally, I feel that 'community service' is over-rated. Obviously, you want to come across as a well rounded personality and show that you can contribute outside of classroom environment. But, joining a non profit just for that is a waste. You would do well to take up something you have a genuine interest in.
Finally, the career goals. In some sense, this is the most critical part of your application package. If you are buying a product and you don't know why you want to buy it, it isn't a very smart move, right?
You need to show/articulate what you have envisioned and how your previous experiences fit in. Having said that, schools know that your goals may change. But, they want to know that you have thought through this. For instance, MIT doesn't even ask for goals in their application. They predict your potential based on what you have done in the past.
In essence, if you screw any one of those badly, you aren't getting in a top school.
Coming to your professional experience, it is unique and interesting. Haven't seen a lot of Indian candidates with that background. So, you may have a leg up in the process. But, the most important part is to keep your head down and move ahead. There will be things working for and against you throughout this torturous cycle. Highlight your strengths, address your weaknesses, and remain focused.
Long rant, this. Anyhow, Good luck!