I figured that if I'm going to be using my tablet for testing out applications then I should back it up before I do anything on it. It was easy to do using the Android SDK.
You will also need to get the Nexus device drivers from ASUS.
Once you've download all of this use the Android Debug Bridge to backup your Nexus.
Here are the sites I used for instructions:
How to install Nexus 7 drivers on Windows