You wouldn't go on holiday without some degree of planning. It makes sense to pack your case in advance, thinking about what you might need for your trip. An overstuffed case can be burdensome (not to mention expensive!).
Similarly when it comes to anticipating the journey at the end of one's life, things really do go better with some degree of planning.
In this episode Calvin and Robin talk about advance / anticipatory care plans. What's included in these plans? What are the potential benefits of this kind of thinking? They also discuss some of the ethical issues here and some of the challenges facing the medical profession.