Backpacking rule #1: Never leave home without a first aid kit. If this is news to you, then you probably shouldn't be venturing into the wilderness. For everyone else, we suggest you carry this kit by Lifeline. The 85-piece kit includes the essentials you'll need should your run into trouble—knuckle and knee/elbow-specific bandages, sting relief pads, tweezers, scissors and a whistle to name a few. It also contains a first aid guide—the next best thing to WebMD when you're without cell service. $20; lifeline.com