One of the most amazing things about digital photography is that each image is also a file, storing the information contained in each shot along with the photo, so you can load it up and see aperture settings, shutter speed, ISO, etc. any time you want. Do you want to become a better photographer? Just find images with the EXIF data intact and study what the pros used to make their shots look so darn pretty. Find out more about the process at Lifehacker.