More information is definitely needed. I would say a good rule of thumb is to stay busy. Pamper yourself and do things that you couldn't/didn't do during the relationship. A nice bubblebath, manicure, pedicure, facial, etc. Go shopping if funds allow and stay close to people who care. I second the stay away from too much bitching. That does get old...quickly.
Stay positive and realize that it was not meant to be. These experiences make you stronger
Cry if you need to, but don't obsess. What's done is done.