I typically prepare a durable power of attorney for healthcare and a durable 
power attorney for financial management for my client's estate plans. 
These documents allow others to act on someone else's behalf in the 
event the person signing the documents becomes incapacitated.

Healthcare directives allow you to record your wishes concerning future treatment if you are affected by a catastrophic medical emergency. 
Durable power of attorney for financial management allow someone 
you trust to manage your personal financial affairs in case you lose 
mental capacity to so act.