One of my friends graduated from NLSIU and after reading some online reviews by the alumni here are the things that I came to know about.

• You can intern at law firms like Fox Mandal, Amarchand and Mangaldas, Trilegal, Khaitan & co., J Sagar and associates, AZB Partners, Luthra and Luthra, Dua associates, etc.
• These are the top law firms that deal with corporate law, merger and acquisitions, real estate, capital funds, private equity, energy law, and many more.
• You can also try smaller law firms at the beginning of your career and then keep moving to the bigger and better ones. 
• Explore different fields of law for a better understanding of the course in the final year. 
• Try criminal, civil, corporate, IPR, arbitration, etc., and be ready to face any work from these fields.

You can also contact your NLSIU seniors or lecturers as they will have the better, more appropriate information to suggest better ideas and places.