Practice (...) meditation while you are on the phone; for the entire time that you are on the phone, no matter who you are talking to, regardless or your like or dislike of them, you remain 100 percent in control of your being - which you can only do by controlling your emotions. Do it in a really attentive way. Don't chatter and communicate about anything unimportant. Remember to be constantly listening to everyone you are talking to; listen to the tone of their voice; be in a calm, peaceful, and controlled state. Bring a meditative state and consciousness into your life 24 hours a day, so that you will want to do this meditation for the pleasure it brings.
Source: Modern-Day Meditation Guide Book by Jim St. James