The best way to impress an internship host is to be prepared for the internship. For a journalism intern this usually means by taking along a notebook filled with story ideas.
Past interns have a range of advice about the kinds of things people should do before they walk inside an international internship organisation.
Tips from job experts also include learning what you can about the workplace before you get there (right down to team photos that show the workplace dress code). It is also recommended that you do a practice trip to the workplace, thus ensuring you have worked it all out properly and are there a little ahead of time on day one.