Welcome Naveen.

Glad your cancer was found early, and only surgery was needed. As far as what you can do now is you can have scheduled visits with your ENT, who will do palpable and visual exams, scopes, maybe schefuled. diagnostic scans, and you too can be vigilant with frequent checkings of your mouth, neck, for anything unusual like ulcers, lump in neck, difficulty swallowing, etc. that doesn't go away. I found all my cancers, eight of them, on my own through self exams, except one, which were suspicious to the doctors also, and proven positive on further diagnostic testing, and that is key too, to find cancers early, instead of later, so they can be treated more easily. I think that's what has helped me. Abstinence from other carcinogens like smoking, drinking, chemicals, eating a healthy diet with fruit and vegetables, correcting or controling any other co-medical conditions like anemia, low vitamin D, thyroid, testosterone, kidneys, diabetes.

Good luck