1. You don’t do small talk.
Russians don’t like to waste their time on empty words that don’t really mean anything: we are very direct and prefer to get straight to the point of the conversation. If you meet your neighbor and you don’t really have anything to say to him, you don’t stop for a chat about the weather and the latest football game. You just say hello and carry on with whatever you were doing.
If you get a “how do you do” from a Russian, you know that he really cares and wants to know everything about you.