The most important document you could have is a Health Care Power of Attorney. This form allows you to designate who will make your health care decisions for you if you are unable to make them.
It doesn't matter how young or old you are, this document will save your loved ones a lot of time, money and heartache if you become incapacitated and are not able to make these decisions for yourself.
Consider one young lady, a friend of my 33 year old sons, who was in a devastating car accident and has been confined to a bed for the last almost two years, unable to speak, unable to walk, unable to feed herself. Her mother is currently going through Florida courts to be able to be her guardian and to make decisions for her and to get her the help she needs.
Or, we have my client, who I will call Trina. Her husband has dementia and late onset Alzheimer's They have been married for over 17 years. She is a little younger than him but they have a strong and loving marriage. His son decided he didn't like her any more (or really, just wanted to get control of his money) and stole him out of the home and has refused to return him. We have been slogging it out in court since last October trying to get him returned to her. She hasn't seen her husband in seven months! This should not have happened.
Think about who you want to make decisions for you if you are unable to make them, and then get this document done. You will be glad you did.