Blogs are convenient repositories of thought, which one can shape toward almost end in interpersonal internet communication. You can have a weekly collumn, short updates on your life, or just a place to link people to where you have your basic political arguments, IE "Why gun rights," "Why libertarianism," or "Why aliens own all of us."
Give it a try. And keep us updated!
PS: mine is at
www.livejournal.com/users/haschenI keep my friends apprised of my activities, post pictures, ask for advice, etcetera. It's probably not interesting unless you know me, however it might give you an idea of how they are run. To get more samples, just click the friends button in the upper right corner, to see all of my friend's livejournal posts. Again, not interesting unless you know them, but it might give you more ideas.
Good luck!