Description of what I did (told you I didn't do much):
-Hue Sat adj layer: reds -9 sat +5 hue, yellow -6 hue - 35 sat - Normal
-Reduced the brighteness and contrast a bit - Luminosity (to not affect color)
Very slight tweak with Selective color (Normal - hardly worth mentioning)
Photo Filter - Sepia 11% density - Color
The important thing is that there is no hard and fast rule to doing this sort of thing in
PS. It will always be image dependent and it helps greatly to have reference files open next to or in the document you are adjusting to help in matching color, contrast, saturation, etc. Knowing how to go after the results you want comes with practice. I did a lot of work that was essentially "Color School" in and of itself early in my retouching career - helps a lot now.