You will have to keep them comfortable and clean and give them social interaction. Best to keep them on a schedule as you would an infant. They come to rely on that schedule. Such as when to expect meals, bed time, getting up, bathing, toileting, medications. Learn all you can about dementia. Keep their area neat, clutter free and replace things in the same place all the time. They get upset when things are not where they think they should be. Let them do as much for themselves as they can. Try to resist doing everything for them when it is not necessary. Understand there may come a time when you will have to transfer them from say the bed to a wheel chair. Learn how to do transfers. Two person is safest but if they are light you may be able to do it yourself. Also you may face having to wash them in private areas or change diapers. It is not complicated to learn how to do it. But learn how to do these things before the day you are faced with it. You can get excellent advice and direction from Hospice. It is a privilege to be able to help them at this stage of their lives and you will be so thankful if you do so later on looking back. If you can keep them at home so much the better so as not to put them through the ordeal of a brand new alien enviornment. Good Luck to you and God Bless.