I struggle with that a bit myself Bill. Right now most of my new content is on my blog. I use social networking, primarily, to drive traffic to that. While I doubt that I'm even scratching the surface of what's possible I do see pretty significant traffic spikes when I announce new posts via those outlets.
In a perfect world each would have some common and some unique content. I just haven't had the time to sort that out yet.
[url=http://www.binaryemulsion.com/wordpress]My Photo Blog[/url]