Enduring power of attorney
To protect your rights and best interests, you (the 'donor') may appoint anyone you choose (the 'attorney') to act on your behalf. In this case you would be granting Power of Attorney over to your chosen representative. This type of Power of Attorney is a temporary arrangement.
A more permanent type of Power of Attorney occurs if you become mentally incapable of tending to your own affairs. Should this happen, Enduring Power of Attorney will come into effect.
You may want to consider choosing someone to act as your attorney in the event that you ever become incapable of handling your own affairs. This person will have the authority to make decisions concerning your living arrangements and handling of your assets, so it's nice to know that you've had a chance to thoroughly consider your options. Making this decision while you're still able could be seen as insurance for the future.