Serving motherland doesn't mean that you should join politics and do some charity work. Do your basic duty as an Indian citizen; pay your taxes, follow rules, work with pride (I'm sure you will be interacting with people globally and a quality work out of India goes a long way in showing the world), make sure family is law abiding, make sure your kids grow up to be a good Indian citizens and most importantly be proud to be an Indiann and love the country. If you do these things, rest will automatically be taken care. Jai Hind!