A couple week ago I moved out of my room and in with a few friends who had an extra space. I love it. :]
Now I don't have to worry about my mood going from fine to down the drain when a person walks through the door. I have my own personal space. I don't have to worry anymore about someone walking in and turning on the light while making a really loud remark about how she doesn't care if I'm asleep she's going to do it anyway (wasn't there for that but if I was it would not have been pretty). I don't have to hear "you're being quiet today" like it's a crime. No one tells me what they're doing, where they're going, who they're going to be with at every moment of the day either.
I also feel more motivated to do homework and other things too. :] My mood's improved and so has my quality of work (thought it was getting done before but I feel it's better now).