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 515th installment in their series of digital spreadsheet magic tricks, you'll learn how to create an amortization table that will update when you pay extra principal so that loan is paid off early. See also how to make changes to a template, get into trouble, then trouble shoot your way out of it so that you can fix the template.