Microsoft have just published a number of Quick Start Guides for Office 2013, amongst them is this gem for Project 2013.
The guides themselves are pretty comprehensive and cover not only the feature areas of Project, but also Project Online and the new Reporting and Task path capabilities.
You can grab the the Office 2013 Quick Starts at Download other Office 2013 Quick Start Guides and the Project 2013 specifically at http://office.microsoft.com/en-us/support/project-2013-quick-start-guide-HA103673696.aspx?CTT=5&origin=HA103673669
