If you are creating sheets that might at some point be used by others, make sure they are understandable and well documented. Most of us don't think about documentation, but every spreadsheet you create for business or personal use should be created with the possibility in mind that others will need to figure it out some day—possibly without your help. If you change jobs, you will be leaving a good legacy behind for the next person, which reflects well on you. A little documentation goes a long way, as shown in Figure 4-5. You can use Excel's Comment feature to add notes anywhere a little explanation is in order.
Figure 4-5. Make sure that critical worksheets are understandable and well documented.