My elder brother is from MNNIT Allahabad so I am quite aware of its pros and cons. 

• Never mess up your pointers. A 9+ pointer will help you get internships, jobs, and ahead in your career. Furthermore, a higher pointer indicates that you have studied that subject, which implies that your fundamental knowledge of the subject is solid.
• Make personal notes on all subjects every year. Your exams will comprise the teachings in your class. It will also assist you in better understanding the subject.
• Maintain a cordial relationship with all the professors, their help will be required in every step while in the college.
• Improve your communication skills by learning English. It will assist you in obtaining a good job because every company values good communication skills.
• Develop an area of interest, do some good projects under professors, and it will help you in the future with jobs and higher education.
• By the end of the first year, make sure you find your goal in life. It can be GATE/IES or maybe CAT, core jobs/consulting jobs, higher studies, Civil Services, etc. Take a decision and be on your toes. Start working on it.

College is the best place to start building your career. You have plenty of time and opportunities to prepare for future challenges.