What is a Durable Power of Attorney?
A Durable Power of Attorney can allow you to choose a person you trust to handle as many affairs as you designate in that Power of Attorney. Their powers can be very limited or very extensive. As long as you are alive, it will be in full force and effect, unless revoked.

What is an Advance Medical Directive?
An Advance Medical Directive allows you to designate a trusted person to make decisions regarding what level of care you desire, should you be, for example, in grave condition with minimal chance of recovery, or not lucid.