Mads Kristensen has created a website which features Visual Studio 2015 keyboard shortcuts in the form of a cheat sheet. You can switch between 2012, 2013 and 2015 editions and find out the commands for performing various actions.
The cheat sheets is arranged as per the alphabetical order. Firstly, you will learn the shortcuts required for navigating backward and forward. The Debug section examines the available shortcuts for debugging your Visual Studio project. The Edit section provides a list of all shortcuts which you will most likely use during coding.
Visual Studio 2015 keyboard shortcuts also provides the required commands for Editor Context Menus, Graph View, Help, Microsoft Azure, Query Designer, Refactor and Solution Explorer. You will also learn the shortcuts used by Workflow Designer, XML and Xsd Designer.
Visual Studio 2015 keyboard shortcuts is an excellent resource for programmers since it helps them to locate a shortcut easily without navigating several pages. You also need not have to refer to books for finding out the shortcut commands. You will find everything in a single page. If you have access to 2013 you just need to click the year and find the shortcut commands.
Kristensen also created a GitHub page where you will find updates to the shortcuts.
From my point of view, Visual Studio 2015 keyboard shortcuts cheat sheet helps you to stay productive without wasting valuable time.