Sorting
Arrange your materials into piles from thinnest to the thickest.
Building
Choose a safe place for your campfire. It should be out in the open away from long grass, shrubs, trees and buildings, and preferably on soil. Some people dig a hollow for a fire.
Practice building a tepee shape which will be the base of your campfire.
Start with the thinnest material and then slowly build up the layers.
Practice till you can do it with your eyes closed!