Working at the cabin these past weeks I've been experimenting with wood fires that don't require stoking and rearranging every 15 minutes.
The best I've come up with is a presto-log and a dry piece of alder side by side. This gives great heat, and will burn as in the photo below for 3 to 4 hours in an open fireplace without any input from me.
Anyone here have any other suggestions? I know olive wood burns forever - but there's precious little of that in these parts.