In 2001 we had a family holiday to Florida with my mum, sister and my husbands side of the family, and mom was in the early stages of dementia, living on her own and pretty much independent. When we decided to go to one of the theme parks with mom I suggested that we get a wheel chair as there was quite a bit of walking, mom point blankly refused to even consider using it. While I saw it as a means of convenience and getting around quickly, mom saw it as taking away her independence, and she remarked to a family friend that she needed to hold on to her independence for as long as possible as when there is no one around she is going going to have to take care of her self. On hearing this I saw how much I needed to at times step back and let her take her own time to do things.
The world was not going to end if she took an extra 15 minutes to do something and I had to work around her time whenever possible. I found that while and in the midst of her loosing her independence it actually gave her a sense of being independent, and so impacted on her health and well-being and how she felt. You have to help the ones that you are caring for feel as if they are holding on to a part of themselves especially, in an environment where nothing is the same and constantly changes as the memory decreases.
For today, give yourself that extra bit of time to get through the days activities, in doing so you create less stress and impact greatly on your overall heath and well-being.