DEFINITELY lay down what you both expect out of each other at the very beginning, before any conflict arises. That way, when something does come up, refer to your roommate agreement! aren't really applicable, but it depends on you & your roomie!
10 ways to make a small space seem BIG. sorry but small spaces are small spaces and in my experience I have never once been shocked to find out that space is not twice that size. of course there are ways to utilize small spaces well.