My wife wasn't thrilled when I made a concious decision to try and economize on everything, all at once.
We started with the house, driving the utility expenses down {try ecorenovator.org sometime when you decide to save money at home too} and when she saw less of our income going to the power company, she jumped into the effort.
When I slowed down, literally, in my driving and started saving her nerves from my earlier boy racer mentality and money from fuel economy improvements, she started saying of my lower speeds, "It's faster than I can walk, so take all the time you want." I love that girl!