Periodical processes like the volume of support service calls often have critical zones that indicate a severe problem that needs to be investigated and mitigated. This tip shows how to reveal and emphasize those critical zones for analysis.

Saving your workbook in the same location with the same name is easy.

The Open dialog box, is your key to finding and retrieving Excel workbooks.

Suppose you'd like to add a couple more commands to the Quick Access toolbar. Also, say you're a big fan of AutoSum. You can add the AutoSum button to the Quick Access toolbar, so you can quickly create and use AutoSum entries.

Creating custom menus in Excel is a funny feature you can use to create groups of the options that you use most often, and then plug them into the menu you name and use yourself.

Often you'll want to insert a series of dates into a worksheet. The most efficient way to enter a series of dates doesn't require any formulas - just use Excel's AutoFill feature.

If you want to paste text in your worksheet, you can use Excel's Convert Text to Columns Wizard.

Solver tool allows you to specify multiple adjustable cells and constraints on the values that the adjustable cells can have, generate a solution that maximizes or minimizes a particular worksheet cell, generate multiple solutions to a problem.

Goal seeking is a useful feature that works in conjunction with your formulas. If you know what a formula result should be, Excel can tell you which values of one or more input cells you need to produce that result.

Because timestamps are represented as serial numbers, you can subtract the earlier time from the later time to get the difference.