I know most of the activities on this site are aimed at Nursing Homes however, they often work really well for us out in the community too. I do a day long respite for a lady with Parkinson's and also dementia. A lot of the activities listed here are really helpful. Working one-on-one for a whole 8 hour shift you really need to be on your toes. This lady really enjoys cooking so we do that a lot. I find it important to break the day up into sections and rotate the activities to keep her stimulated.
10 Daily Living Activities for Dementia Care