1. A computer-implemented method of identifying information of interest within an organization, the method comprising: determining use data that characterizes relationships among information items within an organization and relationships between the information items and users within the organization, wherein the information items within the organization include user data and collections of information items, wherein each information item is a document, a presentation, a video, an image, or a webpage, wherein the organization includes a structured body of users with associated roles within the organization and who have access to the information items within the organization, and wherein each of the information items within the organization includes one or more properties from a group of properties; receiving an indication of a first group of one or more of the information items within the organization; for each of a plurality of properties of the group of properties, determining whether the property is a useful property at least based on whether the property applies to a non-zero proper subset of the information items of the first group of one or more of the information items within the organization; for each of one or more of the determined useful properties, displaying an indication of the determined useful property; receiving, from a first user, a selection of one or more useful properties; based at least in part on the received selection, identifying information items of the first group of one or more of the information items within the organization that apply to the selected one or more useful properties; and displaying an indication of one or more of the identified information items of the first group of one or more of the information items within the organization that apply to the selected one or more useful properties.