Media

I have been told repeatedly that it is important for a writer to have an internet presence whether they wish to self-publish or take the more traditional route. I have only just begun to build my presence. For those writers out there, how have you built up your internet presence? What tools have you used? How do you feel about allowing the public access to your personal information and, if your not comfortable with it, what have you done to protect your info? 

Also, what are peoples personal experiences with publishing and spreading word about your books?