When in Snapseed, I usually follow these steps after importing the image: adjust structure and sharpness to taste > add vignette to focus the attention on your subject matter and help move the eye through the image > add a subtle film grain layer, which also adds a colour grade (warm or cool etc.) > add a softening layer to reduce the digital feel of the image > create a number of “dodge and burn” layers to fine tune various areas of the image. This emulates what we used to do when printing in the traditional wet dark room. The final image adjustments usually include ambiance and saturation.