This is me writing to you. To start with, I am learning CP and web dev now. May also try some other dev platform soon. My first goal will be to get a good internship leading to a good job. I am also looking towards participating in GSoC.
Thanks to Udaan, I have found good interest in literature, which I hated before coming into college. I have ordered some books related to life and values. This, I found, is the best thing to do in leisure. This keeps me sane.
I also want to start investing in stock market by next year. I would also try some freelancing.
I hope I do all these by next year. Finally, my advice to you: Stop wasting time and do some real work.