Check out this short video to familiarize yourself with the new design of Office 2010. This video contains audio; please turn on your speakers.
http://office.microsoft.com/en-us/support/redir/va102141080.aspx
Microsoft has developed visual PDF guides to help you learn where your favorite commands are located in the new 2010 interface. When you click the link below, the PDF guide will open.
http://officeimg.vo.msecnd.net/en-us/files/953/054/AF101930490.pdf