
I urge all my clients to execute a Durable Power of Attorney for Health Care (DPAHC), naming an agent to make health care decisions and providing some guidance and limits for the agent.
When you complete the DPAHC form, you should indicate your specific desires regarding treatment, or any circumstances in which you might want life-sustaining treatment withheld. In addition, you may want to specify who may (or may not) visit you in the hospital, and who will be responsible for funeral or burial arrangements.
A Declaration Pursuant to Natural Death Act (California's form for a "living will") may also be appropriate for some clients, but I often find that clients are uncomfortable with the broad scope of this form after they re-read it several times.
"Old age isn't so bad when you consider the alternative." Maurice Chevalier