Take a charcoal disk and place in a fire proof container. Please note that the container will get VERY hot. So also be mindful of what surface you place the container on.
Light the charcoal and when you see the little line of sparks move across the entire disk, you can place a pinch of the loose incense on top. It will burn slowly over time and you can keep ‘feeding’ the charcoal disk a few more pinches of herb if it is still lit and you want to have the smoke continue.