Gretchen Rubin, in The Happiness Project, has an interesting take on the proverb "If mama ain't happy, ain't nobody happy" - or its pithier version, "Happy wife, happy life."
Rubin is herself a wife and mother. She believes that this proverb is true (with which I agree). She also argues that because it is true, she has a responsibility to her family to try to be happy. As a result of her happiness project, she made a concerted effort to be less critical when things didn't go as she hoped with her husband and children, and to enjoy more what her family did with and for her.
Rubin says her effort to be pleased paid off for her family as well as for herself.