Change the Show this number of Recent Workbooks, Documents,Presentations setting, to increase or decrease number of Recent files in Word, Excel, PowerPoint.

To embed or insert an audio or sound file in a Word document, Excel sheet or PowerPoint presentation, follow the steps mentioned in this tutorial.

Google Docs and Google's Cloud Connect toolbar for Microsoft Office combine to let you do simple editing of Word and Excel files on an iPad without having to pay for a separate app.

You can do a mail merge in Microsoft Word and Excel to create personalized documents for many recipients at once.