The office phone (well, any phone) was my nemesis. So what I did was buy the same phone on Ebay and I practiced every day making and receiving phone calls. Many may seem this silly but when you can retrain your brain, amazing things happen. For months and months I would practice daily making up phone conversations until it became boring. Once that happened and I desensitized myself from the crippling fear of the phone, when it came time for real world application, it was a piece of cake because my brain remembered how BORING this process was. I surprised myself because I thought this phone was going to be the death of me (business-wise).