You can use pictures of the patients family with captions saying who they are and their relationship to the individual.
If they are still able (but forgetful) in the kitchen put pictures on the cupboard fronts to show what is in them. If they can't get the right order of a task e.g puts water in the teacup and then switches on the kettle. Try putting ...
For activity you need energy, try eating foods that contain polysaccharides. That's what athletes eat before triathlon.
Reference : https://en.m.wikipedia.org/wiki/Carbohydrate
Monosaccharides help for short time energy boost although they can turn into fats if not used.