Travelling to a new country involves many an aspect of cultural exchange. Being aware of as many as we can can make the trip smooth. Religion plays a very significant role in the spiritual life of a region. It is important to know how people tend to react when disagreeing in order to avoid offence and for many people it is interesting to see what goals and ambitions we have in common. Consequently the least important item from the ones listed is "how long it takes to learn about the other cultural group".