Not so much a blog this one, but just a few links that I share on Office 365 Admin training courses. I’ll add to this as I find more.
Automatic SharePoint Online Site Collection Storage Quotas http://blogs.office.com/2014/08/18/sharepoint-online-simplifies-storage-management/
Office 365 Development Roadmap http://office.microsoft.com/en-gb/products/office-365-roadmap-FX104343353.aspx
Office Blogs http://blogs.office.com/
Office Visio Stencil’s: http://www.microsoft.com/en-gb/download/details.aspx?id=35772
Office 365 Jump Start (Small Business) http://www.microsoftvirtualacademy.com/training-courses/administering-office-365-for-small-business-jump-start
Free eBooks incl SharePoint & Office 365 http://blogs.msdn.com/b/mssmallbiz/archive/2013/06/18/huge-collection-of-free-microsoft-ebooks-for-you-including-office-office-365-sharepoint-sql-server-system-center-visual-studio-web-development-windows-windows-azure-and-windows-server.aspx
End User Training Resources for Office 2013 and Office 365 http://technet.microsoft.com/en-gb/library/jj871004(v=office.15).aspx
Security – Office 365 Trust Centre http://office.microsoft.com/en-gb/business/office-365-trust-center-cloud-computing-security-FX103030390.aspx
I’d also highly recommend the MS Press Book – SharePoint 2013 Plain and Simple ISBN 978-0735667006 (which you can buy on-line at MS Press Store as a PDF.
Or use the Help in Office365 from the admin pages – it’s actually VERY good