Making fire is a fundamental bushcraft skill and one that can be quite difficult. Regardless of the method, whether primitive such as the bow drill or by modern means like a lighter, the entire process is a skill that must be practiced. Once again the Bushclass USA program has a good class on making a twig fire. It is simple to do and does not even require a knife or saw to cut wood. Practice and plenty or prep is a good recipe for a strong fire.