SharePoint 2013 Admin

Shredded Storage – TechNet – Official from Bill Baer
http://blogs.technet.com/b/wbaer/archive/2012/11/12/introduction-to-shredded-storage-in-sharepoint-2013.aspx
Shredded Storage Overview
http://www.learningsharepoint.com/2012/12/14/sharepoint-2013-shredded-storage-how-it-works/
Using Copy-SPSite to rename Site Collections in SharePoint 2013
http://www.toddklindt.com/blog/Lists/Posts/Post.aspx?ID=372
Document your farm using PowerShell
http://technet.microsoft.com/en-us/library/ff645391.aspx
Licensing
http://www.degdigital.com/blog/big-changes-in-sharepoint-2013-licensing-for-portal-clients/
Host Named Site Collections
http://social.technet.microsoft.com/Forums/en-US/sharepointadmin/thread/b5323367-a06a-4747-b1cb-3139dad6457b