Please, please, please... talk to an attorney about a will and other documents that you might need.
Everyone needs a HIPAA release due to the recent changes in the laws that can find doctors thousands of dollars. Even if married, you need a HIPAA release for your spouse to talk to the doctor.
I also recommend that you think about
1. Who you would (or would not) want to be your guardian if you ever need one
2. Who you want to handle your funeral arrangements
3. Do you want to donate your body to science or leave the option open for body party to be donated
4. Who do you want to make medical decisions if you are unable to talk or communicate
5. Do you (or don't you) want to be put on life support if your death becomes inevitable
6. If you have children, who would you like to be your children's guardian (or not be appointed a guardian)
7. Who do you want to handle your financial affairs if you become unable to do so
I know we don't like to think about it but we are all getting older each day and none of us are getting out of death. At least, I've never met anyone.
You can save money and family feuds if you designate people to take care of your affairs.
And please don't wait until you are mentally unable to sign legal documents.
Do it now when there is no rush and you have time to think about it.
I encourage people to review their financial affairs and where they are in their life every 5 years.
I had someone listed that moved across the country so I had to revise my documents since he was no longer around to help me.