You can significantly reduce the number of errors in data entry in Excel by protecting changes of specific spreadsheets (worksheets) and cells.

Working with large and complex Excel workbooks, especially when entering large amounts of data, no one is protected from accidental changes in formulas, formats and other spreadsheet elements. But you can protect yourself from too much work on finding and eliminating such errors by protecting the individual spreadsheet elements.

Sometimes you might want to lock cells in your Excel spreadsheet that contain formulas and functions or data. Thus, the person doing the data entry will not accidentally overwrite or delete the spreadsheet formulas and functions or your data.

If you are working with huge workbooks that contain a very large number of formulas, functions, and data, you can turn off the automatic recalculation.

To move around the worksheet with your keyboard, use the key combinations:

Normally, cell comments are rectangular, but you can give a cell comment any shape you want:

If you work with the same workbooks every day it will be helpful to open specific workbook files automatically whenever you start Excel. Any workbooks placed in the XLStart folder open automatically.

You can make your Excel spreadsheets more appealing by choosing graphics file to serve as a background for a spreadsheet similar to the wallpaper that you may display on your Windows desktop.

Using the Hide command you can hide the data and formulas from "inquisitive minds". But some of them still can use Unhide command. Nevertheless you can completely hide Excel spreadsheet so that it will be needed some VBA programming to unhide it.

You can make a worksheet more visually appealing and easier to read by centering text across multiple columns. Often you do this by merging and centering the merged cells, but it is not the only option.