This book written by Judi Culbertson and Marj Decker is a complete guide to help you declutter and move. It has practical solutions for downsizing your clothing, collections and dealing with sentimental items.
It also addresses how to move a family member to a supervised living facility. The authors remind you that if your parent can make decisions that your purpose is to help them move happily from a large space to a smaller space not make decisions for them.
It suggests that you write a book about your life, put it down in black and white. A number of different ways of recording events about your life are provided.
It has a chapter on the step by step process of moving into your new home. They examine the psychology of making the down scaling change
It is a great resource to have. Who knows when you will need it.