WEB Presence !!!!!!

I remember once a friend of mine asked me "Do you have web presence?". I said yes I have email accounts. He said that is not enough. Being a IT professional you should have a web presence. You all can check your web presence by writing your name in google. There should be links associated with your name. How can we start? It is very easy. Join technical forums like Experts-Exchange, write your own blogs, join IT communities like Linkedin, publish your presentations and project work on slideshare. You can also have your own website. This web presence can always add value to your professional career.