What should I put in a stocking for my boyfriend?

I had this crazy awesome idea that for to Christmas for my boyfriend I would get him a stocking of a bunch of sweet things he likes. Hes pretty into technology and music and he's so smart and loves video games. he's in style and he's athletic- likes to snowboard/ski and things like that too. That I guess was just to give ideas for help. I need to find things to put in there for him.