And then you wait.
Even if you have written for the publisher before and are feeling pretty confident about your story, you can't help but think about your submission all the time. Have they read it? Are they reading it? Who is reading it? Do they like it? Do they hate it? Do you think you made a bad choice in character development? Have you suddenly become an untalented hack? Did you ever have any talent to begin with?
You check your e-mail, over and over again. You try to move on and write something new but every once in a while you think about that submission. How many days has it been since you subbed it? You check again.
Yeah...that's where I am right now.