Concerning the content, I think I’ll write short photographic post on both FB and G+ whenever they are too long for Twitter. I also publish an excerpt of each new article on FB, but not on G+ because this function is still not supported. In this way the CO-mag pages on Twitter, Facebook and Google Plus will all have a different content.
Once that said, I’m still open to your suggestions. Do you prefer to have all the FB updates on Twitter, or to republish all the tweets on FB? Or a completely different content for each social network?