In a survival situation or during a camping or bushcraft activity, sooner or later you will (want to) make a fire. A firesteel or a storm lighter is the tool for this. A storm lighter, also called a turbo lighter, has a very powerful flame and is usually ignited with an electric spark, which keeps the lighter burning in all weather conditions. Ideal for bushcraft or survival.
A firesteel is a perfect tool, but a storm lighter or storm matches are easy to use and provide instant fire. Of course you still need flammable material, but it is a start.