All you need to do it harness your crafting might, create an awesome papercraft diorama using Minecraft Papercraft Studio, and submit a picture of it to their tumblr. We're judging the top entries, then 57digitial are sending out awesome prizes, which you can see by clicking the image above.
It's probably worth taking advantage of their most recent update in your creation: Papercraft Studio now features "EasyCraft" tiles that let you turn a common cardboard box into something significantly more exciting. Here's a video that explains how it works.
In other news, an Android version of Minecraft Papercraft Studio is currently in development. More on that soon.
Owen - @bopgamel