First thing I did was use a Screen blending mode in Photoshop - about 7 or 8 times to lighten the picture so you could see it. Then I went to Virtual Photographer, (free filters) and scrolled through the list until I saw one I liked. I chose a faded filter.
Then I opened up some Totally Rad Actions and applied Boutwell's Magic Glasses, which sharpens and lightens the image. (You can get a free sampler pack from Totally Rad Actions)