Chewing Gum and a battery can be used Fire Starter - Use the foil-backed wrapper to short circuit an AA battery and create a flame. First, tear the wrapper into an hourglass shape and touch the foil to the positive and negative battery terminals. The electrical current will briefly cause the paper wrapper to ignite. Use the flame to light a candle or tinder.
For the outdoor adventurer, perhaps the most practical reuse for old wine corks are fire starters. Just soak your cork stoppers in a jar of alcohol before you head out on your next camping trip and you've got instant fire!