As an end-of-life doula, I help people with the following paperwork/tasks to prepare for end-of-life so that their family doesn't have to stress about it when the time comes:
Advance Directive (which includes letter of intent, healthcare power of attorney, living will, organ donor form)
Medical Binder
Funeral Planning
These things can be done AT ANY TIME, ANY AGE. It is never too early or too late! Doing this now takes the burden off of your family and allows them focus on grieving once you transition.
