G.♣.
I think it helps to know what he most needs when he's stressed. My husband usually needs to be given some space. If he comes home cranky and irritable, I try to be kind and then leave him alone.
We don't always deal with everything the way we should. Sometimes we let our grouchy moods get the best of us and we get into unnecessary arguments. But we both try not to let that happen, and we are both much, much happier when we give the grumpy person what they need in order break out of their funk. My husband needs space. I prefer hugs and reassurance. I like to be able to talk about my day (even if there isn't anything my husband can do to fix it).
We all need different things. What does your husband need from you?