The other posters here so far have offered some decent suggestions, but let me correct and consolidate a few to give you a cohesive plan.
Originally Posted by paulm64
These are some good steps to ideally take:
-charge your TouchPad to around 40%, which is the ideal charge state for long term Li-Ion battery storage. (How to Prolong Lithium-based Batteries - Battery University)
-You don't want moisture reaching your device, so if you have a FoodSaver or similar machine in your kitchen, you can use that to vacuum pack your TouchPad. Otherwise, at least put your TP in an air tight freezer bag, or the anti-static bag it originally came in. Then add some dry rice and squeeze the extra air out before sealing it. Put this bag into a second back if you want to be really sure.
-Store your sealed Touchpad in a freezer.
Note: When you decide to take your TP out of cold storage, let it sit at room temperature for a little bit before getting ready to power it back on.