In this photo the image is a little cold.
Warm photos tend to be preferred by most people so that's what we are going to add to this photo.
Notice that this warming filter changed the entire mood of the photograph.
This process is quite simple. Create a new adjustment layer using "Photo Filters". Select one of the warming filters and adjust the saturation according to the overall look of the photograph.
Remember, we use adjustment layers so that we can go back later to either remove or adjust this effect we've added.