Microsoft Office 2013 includes a lot of changes.
To help users to understand how applications works now, Microsoft released recently the Office 2013 Quick Start Guides: http://office.microsoft.com/en-us/support/office-2013-quick-start-guides-HA103673669.aspx.
These printable guides contain usefull tips, shortcuts...
I also recommend you to watch What’s new in Office 2013 videos :
- What’s new in Office 2013
- What's new in Word 2013
- What's new in Excel 2013
- What's new in Outlook 2013
- What's new in PowerPoint 2013
See you soon