No matter how old you are, you need to discuss death with your parents, your children (when they are older), your significant others, and any other family you feel you might be involved when you die or they die.
A handy site to help you http://www.gyst.com/
I have a will, a DNR with my MPOA, i have life insurance, i do not want a service, i do not want a viewing so casket moot point, i want organs donated and body to science and cremate the rest.
Visit your friends, your family, or at least email them or call them, you never know when they will be gone, don't regret it.
Tell people you love that you love them.
Tell people who have impacted your life, your career, etc, what impact they had - you never know when they will be gone or you will be gone and it is important for people to know the impact they have had on the world.
Please read about the the mission of the Death with Dignity National Center - support them if you can. All states should have rules that allow anyone who wants to die, no it doesn't kill people it's a choice. I know I would choose not to suffer.
Advance Directive for Healthcare (http://www.vsb.org/site/public/healthcare-decisions-day) is what you want to have in place to designate an agent in the event you're unable to make decisions yourself and also to describe what powers that agent has and, if you wish, how you expect that agent to handle things. It's a nice standard form in fairly simple language and it indicates the needed signatures, etc.
An advance directive can also be registered in a database in VA, so it's accessible as necessary. https://www.virginiaregistry.org/
The state bar also has a page quickly explaining last wills. http://www.vsb.org/site/publications/wills-in-virginia/