A few weeks ago my mother sent me a link to Parent's Wish a "touching and poignant slideshow of a parents' wish during their old age... Recommended viewing for children whose parents suffer from old age diseases (parkinsons, alzheimers, dementia, etc.)." A direct link the the show is here. There's a Josh Groban song (you raise me up from Closer) playing during the show so you might want to turn the sound up.
There are special versions for both single mothers and single fathers.
You can learn more about the creation of this inspiring slide show here.
If you are losing your patience and feeling frustrated with the people in your life who are losing their memories and skills, taking a break to watch this slide show may help.