Here is a great excerpt from Phone Interview Tips for those searching/interviewing for a position from emurse:
Know your comfort zone. Some people perform best in a quiet room, while others prefer to pace around. If sitting still is your style, a room free of distractions is best. If you are the type of person that likes to walk-and-talk, consider determining a predefined route. This will help ensure that there are no outside noises or unexpected distractions like sirens. Make sure it is a leisurely walk so you can maintain calm breathing patterns.
Smile. Negativity or a uneasy attitude can easily show itself over a phone call. Before the interview, consider spending a few minutes listening to your favorite song or watching a funny video on YouTube. Make sure you are in a good mood.
Disable call waiting. If for some reason you are not able to disable call waiting, absolutely ignore it if someone calls.
Enforce a dress code. Believe it or not, properly dressing in at least a business casual attire will make a big difference in your ability to focus on the interview. Wearing the right clothes and taking a serious approach to the call will help you maintain a professional attitude regardless of your surroundings.
If you are taking the call on a cell phone, make sure there is no wind in your vicinity. Wind noise will prevent you from hearing the questions and make it harder for them to hear your answers.
No chewing gum, cigarettes, food or other things that may interfere with your vocal chords during the interview.
Listen. Without the visual communication of an in-person interview, it can be tough to know when to stop talking. If your nerves are high and your blood is flowing, you can easily make the mistake of saying too much. Make sure to speak slowly and articulately. When you have answered the question, allow for that possibly uncomfortable moment of silence. This will let the interviewer know that you are through, and then they will proceed. Listen and wait for them to finish with their next question, and then proceed. Consider taking notes on the key aspects of each question.
Stand up. Stretching out your torso will allow you to have the full strength of your lungs. You will be able to speak more clearly and powerfully.
Practice makes perfect. As with all interviews, practicing before hand helps you prepare forcommon interview questions. Remember to ‘play in practice as you will in the game.’ It will make a huge difference.
If you wear earrings, remove them before the call. Many people tend to adjust the phone’s headset during a call. Chances are that the earrings will rub up against the mic creating an awkward, distracting noise for everyone on the call.
No speaker phone.
Make sure to ask for your interviewers name. Follow up with a thank you note…”