Here is a great article on unit testing coverage written by my fellow Microsoft MVP Jeremy Clark. Microsoft actually told me that a good coverage goal should be 75%. https://jeremybytes.blogspot.com/2016/08/code-coverage-should-not-be-goal.html
Here is a great video that show Visual Studio editing features that you might not know about. https://channel9.msdn.com/Shows/Visual-Studio-Toolbox/Developer-Productivity-in-VS-2015-and-VS-15/player?format=flash
Here is a great, quick video on how to create a simple Universal Windows App: https://mva.microsoft.com/en-us/training-courses/quick-start-challenge-universal-windows-apps-in-visual-studio-14477?l=Be2FMfgmB_505192797
Here is a great video from Channel 9 that discusses how development can still be hard. I totally agree... many aspects of development are harder than they use to be. As an architect it's a daunting task to come up with a lasting solution. Click here to view the video.
Here is a great video on some of the new code analysis built into 2015! https://channel9.msdn.com/Shows/Visual-Studio-Toolbox/Fixing-Coding-Mistakes-On-The-Fly-in-Visual-Studio-2015/player?format=smooth
Here is a good video demonstrating a few of the cool new debugging features in Visual Studio 2015. https://channel9.msdn.com/Events/Visual-Studio/Visual-Studio-2015-Final-Release-Event/Universal-Windows-Apps-Debugging-and-Profiling/player?format=html5
Here is a great video on one of the new features in EF7. https://channel9.msdn.com/Blogs/Seth-Juarez/Key-Generation-Strategies-in-Entity-Framework-7/player