Drop-down lists in an Excel sheet can greatly facilitate data entry. Here's a look at how to use Microsoft Excel's data validation feature to create handy lists within your worksheets.

Excel Add-Ins are applications written by independent programmers that provide enhanced capabilities for the primary software. Here's how to install, manage, and choose the best Add-Ins available.

Once you have mastered VLOOKUP in Excel it's time to move on to INDEX/MATCH. This formula combination gives the same results but without the problems of VLOOKUP.