In the first year, you can also develop a hobby if you don't have one already.
I suggest you also try almost everything mentioned in the following websites:
If you sing, dance, play word games or are enthu in photography,http://gymkhana.iitb.ac.in/~cultural/
For those into making robots, planes, astronomy, physics or electronics we also have a science club, visithttp://www.stab-iitb.org/
And if you are enthu in sports / want to learn a new sport,http://gymkhana.iitb.ac.in/~sports/
As you can see, there's lots of productive work you can do. Don't limit yourself to tv serials