Everyone knows how to do well in academics, there is nothing different about NIT Raipur. In order to well in academics, all you need to do is plan effectively. It is a good idea to go through the notes and keep also doing the same with the previous notes.
As for your placements, it really comes down to the skills that you possess. So, try to make the most of the four years.
For excelling in studies, an attendance of 80% would be enough. Careful arrangement of notes is also a very good tactic for getting the best results. Also, prepare thoroughly for the end semesters as the results matter a lot.