New to 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 Excel tutorial from ExcelIsFun, the 236th installment in their series of digital spreadsheet magic tricks, you'll learn how to create a database for keeping carpentry measurements as well as how to use a COUNTIF function formula for calculating how many lumber pieces you'll need to cut for your home improvement project.