Good article.

Due to the situation at the time, my close family I told via phone and/or IM. I wanted to do it in person, but time and travel made it impossible. The plus is that it gave them the space they needed to digest the info. I came out to them once I figured out I was TS which was about 3 weeks into HRT. I also remember emailing them a few links as my father used to be really active on the Internet. It still took awhile and more than one argument though.
For friends, some found out shortly after my parents and I told them face to face. The others were told a bit later, when I got tired of layering my clothing all of the time. A couple of these were by phone.
Listen to the advice of others but realise that each of us goes about this task in our own way.
Good luck.