Crisis Prevention.com (CPI) has a thoughtful and helpful list of twelve actions to take to help those with dementia and "10 Absolutes of Communicating through Alzheimer's". Both can be found at this link. Speaking from experience with my mother and Alzheimer's, this is not only useful but important information for dementia caregivers.
The "10 Absolutes , , ," are like the Ten Commandments for caregivers and list ten actions not to take when dealing with those with dementia and then follow these actions with an alternative action to take. As an example: "Never condescend; instead encourage/praise.", or "Never argue; instead agree." This is invaluable information and is empowering to both caregivers and those with dementia.
I cared for Mom for seven years and learned so much from my experiences with her and Alzheimer's.