Whatever you do, find a group. I make it a point to go out at least every other weekend with a group unrelated to work.

I recommend finding a group for something unrelated to your work but that you are still passionate about or at least find interesting. For me it's geeking out about movies and eating morning Dim Sum.

It's also nice that it "pops the bubble" a bit and reminds you that other people may not interact quite like you do at work. People still poke fun at me when I say I'll "ping" them about next sunday.