I guess what is best depends on your situation. Cotton balls covered in petroleum jelly or soaked in paraffin can be stored in a zip lock bag making them a very lightweight and portable fire starter for camping. Duct tape has so many uses! One might not know that it also is highly flammable making a crumpled up ball of it a great way to start a fire. Dryer lint placed in toilet paper rolls or wrapped in wax paper is also another effective method for lighting a fire.