Well, here's an advice: The wife is always right. No matter what happens.
Anyway, to relax, I just read books and listen to music. I try to do as little as possible to give my whole body and mind a rest. I don't want to strain myself any further.
After I finish working, I am very tired and stressed. I normally take a steamy hot bubble bath in order to relax. I find that hot baths are soothing and calming for me. It relieves my stress and makes me feel better.