New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 338th installment in their series of digital spreadsheet magic tricks, you'll learn how to use the REPLACE and FIND functions in a new column to extract e-mail extensions, and then use Filter or Advanced Filter to Extract records according to e-mail extension.