Hints reader nkal reports that he was recently trying to print a .DOCX document—which he’d created at work using from Word 2008—on his home printer. Unfortunately, his home Mac had a much older version of Office, and it couldn’t open the .DOCX format.
His workaround: He uploaded the .DOCX document into Google Docs (using the Upload button in the upper left of Docs’ home screen), opened it, and then clicked on the Print button. That converted the document into a PDF. He selected File -> Save Page As in his browser, then saved it as an easy-to-print PDF file on his home Mac.