You can learn a lot from experimenting with manual adjustments and individual filters in a program like Color Efex Pro, but you can learn even more by dismantling a preset to see how its individual parts work together.
Old Photo (Color Efex Pro)
A filter in Color Efex Pro which offers a variety of vintage photo effects, from sepia-tinted black and white to faded colour. In some ways it’s been superseded by newer and more elaborate ‘analog’ film effects, but it still produces a range of attractive vintage photo effects.