Many many years ago I was a smoker, and when nervous I used to inhale deeply. I stopped smoking, but kept doing the inhaling, deep breathing. So when told the same thing for the 10th-20th-100th time, I just do my deep breathing. It was also my secret when doing a presentation or giving a speech, I would have cue card that said BREATHE. I think when anxious, nervous, frustrated, etc. I would hold my breath, then I learned to BREATHE, I found it really helps. When my cousin would call 12 times in a half hour to ask what day it was, I realized she couldn't help it, so I would just BREATHE, and I must confess after many many phone calls, I would stop answering an let my answering machine take the call, I did feel guilty, but in some ways it was self preservation.