Decorate his or her room for an upcoming holiday, like Valentine's Day. A back rub with wonderfully fragrant cream might be very welcome. Many institutions have pastoral visits on request. Gardening in the room or recreation area can be fun and a relief from the monotony of the institution. Be a willing listener and a shoulder to cry on.
Some days are better than others.
Remember that it is a great act of love to visit and stay involved. If it is not a good visit then don't personalize it. Don't take responsibility for its difficulty. If it is a good visit then enjoy. The more you try, the fewer regrets there'll be down the road.