1. A computer-implemented method for organizing files, data items, web site members, or web pages, the method comprising: automatically aggregating with a first data processor user-defined metalabels of a first user for each of a first plurality of electronic files, data items, web site members, or web pages into a first plurality of metalabel hierarchical structures, wherein each of the first plurality of electronic files, data items, web site members, or web pages is also identifiable by a filename, file path, member identification, or domain name on a corresponding server computer, wherein more than one of the plurality of electronic files, data items, web site members, or web pages is assigned a same user-defined metalabel to organize the more than one of the plurality of electronic files, data items, web site members, or web pages in a same metalabel hierarchical structure; and automatically forming for the first user or a second user a personalized second plurality of metalabel hierarchies from the user-defined metalabels of the first user as a function of a predetermined profile of the first user or the second user, wherein the personalized second plurality of metalabel hierarchies includes a reduced metalabel subset of the user-defined metalabels of the first user.