Every year I have a lot of trouble buying christmas presents for my father. He likes what I get him but he hardly uses the things.

I got him some movies he loved and he still hasn't watched any. I got him computer games, which he used and there aren't any games he is into right now.
He has plenty of tools.

I have absolutely no clue what to get him. I ask him what he wants and he says he doesn't know or that he doesn't want anything.

Please can you guys give me some gift ideas? Thanks