-Communication communication communication. You need to talk about everything, and i mean everything.
-If something is bothering you, you cannot expect them to know, because of the distance. So you need to be able to talk to them. Tell them you are upset. With the distance, you cannot behave like you would in a local relationship, you cannot be upset and expect them to know. Sometimes it is obvious, but even then, it is good habit to be straight forward: “I am a little upset right now. X, Y, and Z happened and I am not happy with it”.