Choose the right substitute decision makers (SDM) now.
With all the recent focus on what is now called advance care planning (ACP) in the medical and social work literature, it is important for people especially middle-aged and older people to understand what is at stake.
Using the old terminology of a "living well" there has been a transformation from what used to be a few words in a document somewhere or as a conversation with the family member likely to be the SDM that for example the parent "would not want any heroics" if they develop a terminal illness. The reality is that is no longer enough to help those empowered to make such decisions on your behalf. The new world of medicine has many things that can be done that are no longer considered "heroics" but just part of contemporary every day medicine.