The best stress reliever for a guy, would have to be sex. If he's too tired, you might want to give him a hand in some way. Anger and frustration seem to disappear after a man.... well... does his thing.
A dip in a hottub might help out too. If you don't have one, you could always rent a hotel room that has one in it.
Another thing that I like to do, is to run away for the weekend. Usually I will take off to a beach, but almost anywhere you get away to will help. A hockey game, football game, anything like that should help out.
Something that I never hear of women doing for men, is signing them up for a spa treatment, or to get a good massage. Just coming home to my girl telling me that she bought me a spa package, would make me feel a lot better. It would sound so goofy to me, that I would probably stop feeling stressed out, at least for a little while.