Everyone knows how dangerous it can be to leave lint in your dryer for too long without cleaning it out. If you don't, then go and clean out your dryer immediately. That's because dryer lint is highly flammable and the heat in your dryer can cause it to spark and set everything around it on fire. However, you don't have to simply throw away all that lint you get from your dryer.
You can actually use it as a pretty reliable and lightweight fire starter. The same properties that make it so dangerous also mean that it's a great fire starter to bring with you on camping trips.