The tip is to approach the online persona of every person as a different person than their offline persona. People act differently online than they do offline.

The tip is to approach the online persona of every person as a different person than their offline persona. People act differently online than they do offline. People expect to send and receive as much information and in the same way online as they offline. This is wrong. Figure out the little facial gestures, the verbal indications and such that allow you to get some of the richness back. Obviously, you won't get to as good as offline, but if everyone puts in the effort, you start to understand the limits of what can be sent and received online to each person.