Things to p time/ activities?

My grandfather just had a mild stroke and has had some really bad heart issues so now he's pretty much limited to staying at home and haveing someone take care of him. He still has a lot of his long term memories and can remember things before the stroke very well but most if not all short term rention is gone. He doesn't remember the day or time, whose coming or going (to sit with him) when, if he's taken his medicine or eaten a meal ect. He's sleeping a lot and i don't know if he's just bored or depressed but what are something we could do with him. He used to enjoy reading short stories like the chicken soup books and he was an avid fishermen and just enjoying driving around his neighborhood to vist his friends. I think puzzles and word finds would be too hard for him. And i don't want to do anything to hurt his diginity, i think that's a big issue with his sleeping because when he's awake people are constantly checking on him and he feels like a burden. Any ideas?