<p>I will have my Princeton interview over phone tomorrow.I would appreciate some tips on etiquettes of formal interview.thanks a ton.</p>
<p>There are no "formal rules of etiquette," so to speak.
There can't be, since yours isn't even a formal interview, per se.</p>
<p>There is one cardinal rule, and that is "be yourself."
Of course, speak slowly, calmly, and clearly as well.</p>