Did you know that with Word 2013 you can edit unprotected PDFs? No longer do you have to use an outside program like Adobe Acrobat. Now you can fill out PDF forms and create your own PDFs from Word. Useful especially for primarily text heavy PDFs, this new feature is available in Word 2013 only.
For step-by-step instructions and a video on how to edit a PDF in word, visit the Knowledgebase article.