The Kimball methodology is the go to process for architecting your BI process. This book is the latest version and covers a great deal of what you need to know.
Use Windows8.1 HyperV developer images. My experience moving from Spindle drives to SSD USB drives.
If you are new to PowerBI or just looking where you can keep up to date with the technology, the following links are a great place to start for news, tips, ideas, and updates
There are many ways to make a backup of working files quickly and painlessly. There are many tools available such as TFS, GIT or even SharePoint/Office 365, however sometimes the simple approach is the best if you just want a quick copy.
Microsoft has released Outlook for Mac and provided a hint as to what is to come in the next release of Office for the Mac.