Let Visual Studio 2012 / 2013 open files to the right instead of to the left

Go to TOOLS > Options > + Environment > Tabs and Windows > Tab Well > [x] Insert new tabs to the right of existing tabs

Warning: In Visual Studio 2012, if you have the "Productivity Power Tools 2012" installed in your VS extensions, it has features that override the standard setting to place new VS document tabs on the right. I discovered this thanks to @davesexton here... How to make new doc tabs appear on the right side?

To disable the override by the PPT, go here...

Tools > Options > Productivity Power Tools > Custom Document Well > General > Sorting

Uncheck both items:

• By Project
• Alphabetically

There may be more, but that sufficient to make it work for me.