Do you frequently search for the same type of file or a specific directory on your hard drive? Don't squander your efforts - save whatever set of criteria you use in Search and reuse it. After you finish constructing your search query and conducting the search, right-click in the search results pane (or select the File menu) and select Save Search. You will be prompted for a file name and location, and Search will save the results as a file with the extension .fnd.
To conduct the search again, use Explorer to track down the .fnd file and double-click it. This launches the Search with the save criteria already conveniently inserted into the appropriate fields.