Bark it up! 1
Can it! 2
Okay, this is so cute and clever! Separate the candies by type and then "can" them in mason jars. Even if you don't go all out and decorate the jars it's a great idea.
Ticky tack it! 3
If you are having any parties that involve kids, you can use leftover Halloween candy to decorate gingerbread houses. The the kids have a take-home party favor that they made themselves.