There are small local customs to which we Westerners do not do typical case, then it is worth to know and respect the traditions of this wonderful country so as to avoid nasty surprises. Let's see some rules related to good manners:
In India, besides being required to see every little piece of this beautiful country, it is good healthy using the word "namaste", while clasping her hands in front of the chest (which means "honor to you , within which lies the entire universe ").
In India we must not dwell too much on children and do good things you think will attract the envy of the gods. Remember also that certain animals are sacred (cows, mice and elephants), and then you can not kill or harass. Last but not least, do not touch the plants used as votive offerings, wherever they are.