Find a partner who wants to live happily on their own salary.
It’s no use being happy to save money by eating beans four times per week when your partner isn’t happy unless s/he eats steak five times per week. Say you are happy camping at a lake for a vacation while your partner wants a three week cruise in the Mediterranean. There are so many messages to spend all your money, and so many places to spend it, that it is nice to have a partner who shares your same goals. When you share the same vision of beans and camping and a nice “date” of a neighborhood walk, living well on what you have is that much easier.