1. A computer-readable medium that stores instructions executable by a computer, the computer-readable medium comprising: one or more instructions to identify documents in a network; one or more instructions to assign initial scores to the documents, where the initial score assigned to one of the documents that has been previously bookmarked by a user is higher than the initial score assigned to another one of the documents that has not been previously bookmarked by the user; one or more instructions to determine a score for a particular one of the documents based on the initial scores assigned to the documents that point to the particular one of the documents; and one or more instructions to store the score for the particular one of the documents.