Good question. This cannot be answered ahead of time. Stop growth and go into low level maintenance. No new anything. Everything has to last. Reduce population, demographic decline. Dismantle old stuff when no longer needed in order to obtain new resources. Manual labor to replace much machinery. Work slowdown. Stop all make work. Deglobalize as much as possible. Limit travel. Low energy technology. Pretend that peak mining of everything non-renewable is already way back in the past, because it soon will be.