[agiopwer]

I'd be careful about buying random golf stuff. It is very easy to buy the wrong thing, even if what you are buying is nice.

Golf shirts are always a good idea. It's hard to go wrong with those (unless you start getting a bunch of Rickie Fowler-esqe Puma stuff for your father-in-law). If you know what type of shoes or golf balls he likes, those would work as well. I would generally stay away from clubs.

Good luck.