what can I do when in B.tech or any Bachelors college to make my profile stronger for Scholarships?

I have completed my Bachelors and have applied for MS in some of the universities in USA. What all can I do to improve my profile for scholarships and to get on campus jobs till I get admission confirmation from the universities?

Are you graduated or still studying ? I suggest you read How to get scholarships for MS in USA, it captures all the information.