"It's a low-cost diagnostic for an exhausted mind. Shout out to Alcoholics Anonymous for popularizing HALT. When a sudden urge or an effortless certainty hits you, stop and run the vitals. Are you hungry, angry, lonely, or tired? If the diagnosis is hungry, the prescriptive command is mechanical. Eat. If tired, rest. This is what I mean by automation. Memorize tools such as HALT in advance, and recall becomes easy. Even if your system too is completely depleted, HALT will bring it back online."