Quick Tip: Turn Off Call Waiting
Call waiting, convenient though it may be at times, is yet another way technology has gives us to break our train of thought and create an interruption that derails our concentration. It's also rude to the person on the other end of the line. Turn off your call waiting and see what happens. You may find that you can give your full attention to the person on the other end of the phone. If someone calls, they'll go to voicemail, and you'll be able to follow up as soon as you're done with your current call.
(Call waiting was developed many years before voicemail. At the time, it made more sense to be interrupted than to let an important call get a busy signal and perhaps not try back. Now that we have voicemail, there's no longer any good reason for the interruption.)
Stressed Man with Phone image courtesy of Shutterstock