Pears. I found bosc pears on sale at the store, so I snapped up quite a few.
One of the great things about preserving foods is that when things are crazy cheap, you can buy lots of it and save it for when it's not. Lately I've been a huge fan of dehydration. I've got one of those little electric dehydrators plugged into the wall and the little fella seems to do what I ask of him without much in the way of complaint.
Canning is fine and all...but dehydration is a lot less work and has the added benefit of shrinking the food down to a much more easily storageable size. Also brings out the sweetness of many fruits.
So there's that.