Here is a quick snapshot of me thumbing through my book of photographs by Richard Pousette-Dart. The artist was particularly fond of using the double exposure for portraits, as in this photograph of Betty Parsons made in 1948 illustrates. Oh, and opening up the current edition of Aperture magazine, I see an example of double exposure in the work of Duane Michals.
Learn how to take multiple exposures on your camera or create them in software. "Start anywhere", as John Cage said. If you don't like the results you get, practice more or move on.
Tasting notes: Olympus E-500 camera with it's Kodak CCD sensor and the 35 mm macro lens.
