I've had the distinct pleasure of meeting Dr. Barry Baines, who champion the idea of ethical wills.  On his website, www.ethicalwills.com, he has some great resources on writing ethical wills.  We're kindred spirits, especially concerning his thoughts on the benefits of writing an ethical will.  I see an ethical will as more than a life story, because beyond dates and places an ethical will documents your values and beliefs.  Ethical wills are great legacy tools, because they help to document your legacy while helping you understand more about yourself.  They can also help you identify how you want to continue to improve/perserve your legacy during the rest of your life.