40 year old lady here. Start making dinner. Start packing healthy lunches for both of you if you both work outside the home. Pick a hobby that requires a lot of walking and become totally enamored of it (doesn't have to be hiking, a newly discovered love for Impressionist art will have you guys trekking miles through museums).  If you can afford it, travel to a European city. The walking, the healthy and delicious snd appropriately portioned food, and being surrounded by normal-weight people can be a real "aha!" moment for some people.