Phone Screening Question:

You know how some people, when they are, like, all nervous and stuff, say things in a way that, ummm, makes them sound, you know, kind of, well, less than professional? Be aware of your verbal mannerisms on the phone since your interviewer will have few other cues by which to judge your professionalism.
Another verbal tic that interviewers tend to associate with younger, less experienced candidates is "upswing," a tendency to have the cadence of the voice rise as though every sentence (or portion of a sentence) ends in a question mark. With upswing, this statement sounds much more dubious and less impressive than if you said it using a more factual, even cadence.