Now that I'm splashing around in the shallow end of the "social media" pool, I've discovered that not only does the whole "social marketing" lexicon sound pretty bizarre when taken out of context -- digg, stumble, tweet, etc -- it also takes a lot of time to implement.
I don't remember how I originally found it, but the Shareaholic toolbar has been a great help. It doesn't reduce my browsing space at all; it just puts a little icon near my "home" button. Clicking the icon gets me a petite pulldown menu from which I can zap directly to the social networking/sharing tool of my choice.
Pretty smooth, and definitely useful for any writer trying to consistently promote their work online.