Always learn to make little adjustments
See how fine northies live by not giving a damn to anything. You don't have to get into serious war on small issues.
Smiling at strangers
Generally you won't receive back a smile if you smile at any South Indian, my dear that sometimes makes people little bit uncomfortable and unsecured.
Peaceful coexistence among States
Don't fight among yourself on the basis of state identity and nativity, the nativity shall be a issue of proud for everyone but never the issue of some fight. Learn to respect each other's Great culture while keeping yours at top.
Dancing on bhangra
That's a sort of personal request actually learn to dance on it even if you don't understand the meaning. Nobody gets meaning of these songs outside Punjab but they dance so my buddy, you too enjoy and hence learning difference between secularism and minority appeasement.
