Every workbook contains at least one worksheet, but when working with a large amount of data, you can create multiple worksheets to help organize your workbook and make it easier to find content. Review the video and the 4 pages contained within the Worksheet Basics.
Commands let you control the way your content will appear on a printed page, including the page orientation and margin size. Review the video and all 4 pages in the Page Layout exercise so that you can find out all the tips and tricks.
What about printing? That has got to be important, right? Review the 4 pages of Printing Workbooks to ensure that you know what is necessary to work efficiently with your workbooks.