It is useful to check permission for photography in most places of tourist interest, illegal photography could be punishable.
Bargaining (except for household items, food, cigarettes and medicine) is almost an accepted practiced. Never worry about the original price quoted, you could end up paying a third of it.
In cities, women will inevitably experience at least a session of eve teasing. It is advisable for single women travelers to dress decently and avoid staying out late particularly in quiet and dimly lit areas.