Camping Hack: How to Make Fire With a Lemon (Fact or Fiction?) - I thought this was a pretty clever, although not terribly practical idea. While you may not have these types of items lying around (zinc nails anyone? :)), it just goes to show you what might be possible if SHTF.
Whether you're a curious hiker or nervous camper, leaf identification is a useful skill to have. Learn how to identify different types of non-poisonous and poisonous leaves, like poison sumac, sugar maple, poison oak, gingko, and poison ivy. 27 Leaves Every Camper Should Know How to Identify | Red Rover Camping