A mnemonic device for anyone who is feeling sad or listless. When we are busy ruminating all the things that make life trouble, we sometimes forget our most basic of needs.
HALT reminds us not to become too hungry, angry, lonely, and tired. Even when it's hard to eat or ask for company, it's usually a good idea. It is a hopeless feeling to be lying in bed screaming. And without someone to talk to. Nor is insomnia a good remedy for delirium, even if it is often an exciting and liberating state.
If you need to, try to remember HALT. Even if you won't use it yourself, it will remind you to keep in mind other people's needs.