For most people using Excel consists in filling a few hundredths of cells and to sum them up vertically and horizontally. If you are a little bit serious about spreadsheets you may want to apply some good practices to your Excel sheet design, in order to ensure that any later review will not require more time that it took you to create the original spreadsheet.

Don't worry, some smart people have thought about what would be the best approach therefore, and have summarized their work in a very useful document (just click on the image below).