Bring him something he likes, maybe a Wendy's double cheeseburger and a Frosty.
My wife's favorite uncle died at the MD Anderson Cancer Center in Houston about two years ago. The extended family all traveled to Houston two weeks before that to try and donate white blood cells for him. He had been sick for awhile, but it wasn't obvious that he was going to die. I talked to him a lot over four days, mostly about all the stuff he was going to do when he got out of the hospital and got his ass back to his home in Orlando. So I tried to give him positive messages.
The last day I was there (my wife stayed a day or so longer), I came in his room and told him we were going on a field trip. I had discovered a nice restaurant in the complex the day before and had made a reservation for six for lunch. I found a wheelchair, put him in it, and rolled him half a mile out of the leukemia ward and through the sunshine to the restaurant, with family members walking alongside. We had a great lunch and a great time with lots of laughs, then returned 90 minutes later.
Two weeks later he was gone, and the following Saturday was his funeral in Orlando. There, I found out that my little field trip idea had produced:
- the last time he walked
- the last time he was outside
- the last time his whole family was around him at once
- the last time he ate real food
- the last time he wore regular clothes
So little ideas like that can have a bigger impact than you think. Be creative and give him something (like an experience) that he may not get again.