In this Harvard Business Review article it concludes that people are more likely to have a meeting with you, if you ask face-to-face rather than email.

I'm sorry but don't we know this already?

If I walk up to a stranger in the street, and I look engaging etc, they are more likely to say yes to having a coffee.  If I do this over email, you will probably do want I do with a lot of the email I get, just delete it.

So how do I get that face-to-face impact while on-line?  Well you could have a personal brand?  You could decide not to write like everybody else?  You could try and not try and sell to me the moment you meet me?  Yes, I know that's all a bit, dur.  So why not make a change, it is after all Christmas?