Do you have a will? Living will? POA?
Having visited the ER recently I was reminded of this. If you don't have a Last Will and Testament, Living Will, Power of Attorney or a Medical Power of Attorney you should get one.
Here's how: www.legacywriter.com
I was very impressed by this company. You fill in some very simple forms online and they create state-specific versions of all these documents for you to download. They even supply documents explaining exactly how to execute these documents in your state.
Amazingly you get all four of these documents for $35.
Caveat: They say this, but frankly I bet this is only because they have to. Like I said, I was impressed: This site does not provide legal advice. Use of this site is not a substitute for hiring an attorney licensed to practice in your state.