Communication and belief/confidence in each other. Not easy at times.<br />
I find just not being able to see what he looks like at some of the moments I think about him the hardest. <br />
Set time aside for each other, just like you would if you were in the same place.
Communication and a plan to meet one another sometime in the not too distant future, so when you're feeling down and lost in the relationship you have something to hope for.