Burn anything organic ~ wood, leaf, trash etc.~ and you got an organic briquettes.
I tend to end up with ash. What technique do you use?
Burn anything non-organic ~ soil, sand etc ~ and you got a non-organic briquettes.
Great tip! I'm burning sand right now.
For the organic substance, keep the fire moderate. For the non-organic substance keep the fire high, as long as the substance ain't fly.
Beat it repeatedly with iron or other metals.
When you see the flame lasts quite long after you stops torching, the briquettes probably is ready.
If not, burn it again and again with the same method till the briquettes works.