I actually have an office in town that I can go to (I work for a larger company that's in a lot of cities) so I try to go once or twice a week. I just have an open cube in a quiet corner. It does help, but I usually don't talk with anyone because it's both a very small office and the team there works on different web properties. I'm moving in a few months to a really small town so I imagine I'll checkout shared space there, if I can find it.