But I have promises to keep And miles to go before I sleep

When I am lying in bed waiting to fall asleep, I usually think about how things should be. That means I think about what you should have done and should have said, and how if you had said and done those things I could have said and done the things I was supposed to do.

But most of the time things don't go that way, and most of the time I fall asleep before I get it all straight in my head, the way it should have been.