Video. Here's a fun and interesting look at how Hollywood ages actors with make up and prosthetics versus what they actually look like when they get old. Some of the movies get it very close (Marlon Brando in The Godfather), while some movies are way too liberal with the wrinkles and the balding and end up getting it totally wrong (like Dustin Hoffman in Little Big Man and Biff in Back to the Future Part II).
Lian Marrero has an unusual job. When a customer arrives at his studio, he takes their photograph in whatever they happen to be wearing. Then, he fires up photo-editing software, so his subject can leave looking smarter in print than in person.