Traveler's Code of Ethics

My brother John is spending his J Term in Ghana, Africa. I just came across the traveler's code of ethics he was given before departure and I thought they were pretty great rules to live by in general, travelers that we all are. Here's an abbreviated version:
Travel in a spirit of humility and with a genuine desire to learn more.Be sensitive to the feeling of other people and their cultures.Cultivate the habit of listening and observing. Avoid the practice of knowing all the answers, ask questions.When you are shopping, remember that the bargain you obtained was only possible because of the low wages paid to the maker.Do not make promises unless you are certain you are able to keep them.Spend time reflecting on your experiences in an attempt to deepen your understanding.