1. A method implemented by a computer, the method comprises: identifying a collection of content data files stored in storage locations accessible by the computer, each content data file comprising image, video, or audio data; determining a number of groups of the content data files that are representable on a display coupled to the computer; applying a first categorization method to the identified collection of content data files including determining a first number of groups of the content data files that are generated thereby, the first categorization method selected from a categorization method group consisting of: geographic location of where the content data files were captured; number of steps required to access the content data files in a group; date of when the content data files were captured; the storage file locations in which the content data files are stored; people identified in images in the content data files; object types in images in the content data files; color illumination values of images in the content data files; camera settings used to capture images in the content data files; image formats used to store images in the content data files; special effects applied to images in the content data files; and quality measures of the content data files; using the first categorization method for representing the first number of groups on the display when the first number of groups is within the determined number of groups that are representable on the display; applying a second categorization method to the identified collection of content data files when the first number of groups is not within the determined number of groups that are representable on the display including determining a second number of groups of the content data files that are generated thereby, the second categorization method selected from the categorization method group and different from the first categorization method; and using the second categorization method for representing the second number of groups on the display when the first number of groups is not within the determined number of groups that are representable on the display and when the second number of groups is within the determined number of groups that are representable on the display.