It's tough no matter what approach you take.
But don't beat yourself up. Neither should you keep out momentos. Pack away photos for awhile, have a bubble bath and take care of yourself. If you find yourself thinking about it, take a sort of zen approach and realize that it's a lot like stepping in a river. You might land on a rock now, but in a few moments, you'll find a good spot to chill in.
Don't go to places you go to a lot together right away. And in general, just don't remind yourself of it over and over. That's like sticking a fork in a light socket over and over. It's ugly and painful. At least, at first. Some folks bounce back quicker than others. Take it at your own pace though.