Re: A different point of view...
"Oh, you're doing x ?, do you know you can do it this way?", "You're working on an issue that affects Y? I saw something similar last week and resolved it this way..." "I'm trying to figure out how to do Z. Oh I spoke with someone yesterday, there's an issue with it"
The key is communicating, not communicating face-to-face. I think one of the significant factors in those who find that working at home works is having a good communication infrastructure. That may be no more than email. You can hold a productive conversation over email. I recall one such conversation between myself in Yorkshire and a collaborator in California - I was eating my lunch at the same time (and probably keeping an eye on Bargain Hunt).