The theory is instead of dwelling on shit put a number on it. There are no emotional ties with numbers. Replace the pain with a number and one day at a time you will get over it. So in my situation every day is a new number. Everyday I'm adding +1 and the higher the number gets I can realize I'm actually moving on, So what I do is write a note to myself everyday on a "post it" app. i.e "Day 6. Stay Strong."
So far it's working, I'm not saying everything is fine and dandy, but I feel a whole hell of a lot better.