I've left Facebook pretty much for good.
I got really tired of having to wade through my friends' and family's posts, filtering out all their game accomplishments, smarmy and snarky e-cards, etc. Twitter isn't too far from being dumped, too. I'm getting tired of the constant babbling about hockey and politics... so I moved over to Google+.
It's been alright so far, if a little boring. Since I'm keeping my circles small and organized into tightly packed units, I don't have to wade through a lot of crap to find something interesting or relevant... and it's easier to ignore people this way.
Call me a control freak, but it's much better this way.
I've spent a bit of time fooling around with the features of Google+, and in doing so, came across a free ebook showing how to get the most (or make the most) out of Plus.
It can be found here: http://goo.gl/eRy6z
A few more tips can be found here, and if you're interested, you can add me to your circles (even if it's the "pointless blogs" circle) by clicking the +1 widget on the right sidebar.
Now, if you'll excuse me, I have some circles to expand... the G+ Architecture and Design community beckons.