Valid Passports (6 month or more) and a visa is required by all nationals except the following:
(a) transit passengers continuing to a third country within 12 hours, provided not leaving the airport and holding valid travel documents for onward destination. Application may be made at the Consulate (or consular section of your local embassy) in person or by post.
Ethiopians are very proud of their culture, identity, and country. Avoid criticizing their cultural lifestyle, especially their brand of Christianity (Oriental Orthodox). Avoid all contentious religious discussion, or you may risk all good will and hospitality you could have been afforded. Rather than argue about the merits of Orthodoxy or Islam, it's best to ask friends to explain their customs, festivals and beliefs and to listen with respect.