If you are using Microsoft Office 2003 and now upgrading to version 2010 you will notice BIG changes.

This Microsoft tool is a great way to learn where commands are now located in 2010.

http://office.microsoft.com/en-us/word-help/learn-where-menu-and-toolbar-commands-are-in-office-2010-and-related-products-HA101794130.aspx