Microsoft Support

Getting Started with Office and SkyDrive - Office.com
Office 2013 and SkyDrive, get help with sharing files, saving to cloud, sync
Getting Started with Office 2013 - Office.com
Office 2013 video tutorials, what's new, basic training, assistance, help, tips
What’s new in Office 2013 - support - Office.com
See some of the things that are new in Office 2013.
What's new in PowerPoint 2013 - PowerPoint - Office.com
See the new features of PowerPoint 2013.
What's new in Word 2013 - Word - Office.com
New and improved features in Word 2013.