What does he like?
Does he smoke? Something for a smoker?
Is he housebound? A book or CD, music set, something to do with his hands? A hobby he always wanted to take up? Set of miniature tools? Magnifying glass to help with reading? Large jigsaw or special mat for keeping part-completed jigsaws on?
Is his house cold? Part payment of fuel bills? Warm clothes, cardigan, scarf slippers?
Does he have a sweet tooth - a special box of expensive chocolates?
Is he sporty? A book about his favourite sport / team? Tickets to a match? Memorabilia or clothing?
Does he enjoy driving? Something for his vehicle? Special set of maps? GPS navigation?
Is he a computer enthusiast? External hard drive to keep his documents safe?