This little trick will automatically open the most recent document you opened in Word. It'll save you a bit of time especially if you tend to only work on one doc at a time.
As the How-To Geek instructs us, to create the shortcut, create a new shortcut to the Word program (either copy the existing shortcut on your desktop or right-click on WINWORD.EXE under Program Files to send a shortcut to the desktop). Then right-click on the shortcut, go to Properties and add a space and /mfile1 after the path in the Target field.
You should rename the shortcut to reflect it'll open your last used document.
This trick works in earlier versions of Microsoft Word, not just 2013, but doesn't appear to work for other Office programs, such as Excel.