This is a list of good articles I have come across, that can help me an others pass the SP2013 certifications. At first the list might be rather short, but I will try to collect as much useful information here as possible:
Shredded Storage
This is one of my favorite features of SP2013. In my opinion one of SharePoints main selling point has always been its document management capabilities, and being able to save lots of storage space on all those document you want to store in SharePoint is a big deal. As this article points out using Shredded storage comes at a cost, so knowing when to disable it is key.
http://www.informedconsulting.nl/blog/?p=434
background on Shredded Storage