23. A computer-readable memory device that stores computer-executable instructions, the computer-readable memory device comprising: one or more instructions to search a collection of documents, based on a search query, to identify a set of search result documents; one or more instructions to receive a request to save a selected search result document of the plurality of search result documents; one or more instructions to save information associated with the selected search result document in response to the request to save the selected search result document; one or more instructions to identify a particular document that is similar to the selected search result document based on the saved information and, where the one or more instructions to identify the particular document that is similar to the selected search result document includes at least two of: one or more instructions to determine whether the particular document and the selected search result document have a plurality of outgoing links that point to the same documents, one or more instructions to determine whether the particular document and the selected search result document have a plurality of incoming links that come from the same documents, one or more instructions to determine whether the particular document and the selected search result document have a same format, or one or more instructions to determine whether the particular document and the selected search result document have a same layout; and one or more instructions to boost, based on saving the information associated with the selected search result document and identifying the particular document as similar to the selected search result document, a score for the selected search result document and a score for the particular document for subsequent searches involving the search query.
23. A computer-readable memory device that stores computer-executable instructions, the computer-readable memory device comprising: one or more instructions to search a collection of documents, based on a search query, to identify a set of search result documents; one or more instructions to receive a request to save a selected search result document of the plurality of search result documents; one or more instructions to save information associated with the selected search result document in response to the request to save the selected search result document; one or more instructions to identify a particular document that is similar to the selected search result document based on the saved information and, where the one or more instructions to identify the particular document that is similar to the selected search result document includes at least two of: one or more instructions to determine whether the particular document and the selected search result document have a plurality of outgoing links that point to the same documents, one or more instructions to determine whether the particular document and the selected search result document have a plurality of incoming links that come from the same documents, one or more instructions to determine whether the particular document and the selected search result document have a same format, or one or more instructions to determine whether the particular document and the selected search result document have a same layout; and one or more instructions to boost, based on saving the information associated with the selected search result document and identifying the particular document as similar to the selected search result document, a score for the selected search result document and a score for the particular document for subsequent searches involving the search query. 28. The computer-readable memory device of claim 23 , where the selected search result document is one of a plurality of search result documents that have been saved as saved search results in a data structure, and where the computer-readable memory device further comprises: one or more instructions to receive an indication to save a plurality of the saved search results together as a group; one or more instructions to save, in response to the received indication, the plurality of the saved search results together as a group of saved search results; and one or more instructions to adjust scores associated with the plurality of the saved search results in the group of saved search results in response to saving the plurality of the saved search results together as the group.