I recently changed my surfing habits while trying to build my online social presence (in preparation for job searching). I've started using Newsblur to curate all the obscure development blogs and G+/App.net for all things social.
Basically my strategy is to make myself google-able and try and inject myself into communities where developers are likely to be. For a social network I chose Google+ because that seems to be the one chosen most by developers, or at least has a large percentage of developers as its userbase. For day-to-day, inane twittery I decided to start building up an App.net profile as I would like to see APN succeed (and again, high concentration of developers). I also started using github as much as I can so it can act as a sort of portfolio. And to actually put out content so I'm not just treading water in these networks I started a blog. I've also started following the RSS feeds of the blogs/sites which I find useful posts from and try to discuss interesting new posts in these networks (such as G+'s communities hub).
Not quite sure, as I've started it rather recently - motivated by my desire to get out of school and into the industry. It's been a pretty good motivator, though, to get working on code I can be proud of. That's mostly what I've been focused on lately, since I think even with amazing social networking skills if you don't have the work to back it up it's all just fluff.