OK, first shot at a WWYD:
1. Sharpened with unsharp mask, then reduced some noise.
2. Adjusted levels
3. Adjusted curves - used cross process preset as a starting point and adjusted from there
4. Duplicated layer, set to overlay, and applied high pass filter
5. Cropped away from top and left
6. Applied vignette
I didn't go too crazy with the sharpening and I intentionally left some color noise. When playing with cross processing, I like a gritty/grainy feeling.