Easier said than done, right? Yes and no ... start by setting small and realistic goals. Maybe choose a few new recipes that fit into your plan; something like a healthier grain, smaller portion of meat or a new meat. How about adding wild-caught fish to your dinner plans? Shop ahead for meals so you don't hit a roadblock first thing.
Maybe trying to bring your lunch from home if you're working? Leftover are great especially if they are part of your new plan.
Calling a friend to walk with you after work or whenever you can makes it more likely you'll actually walk! Have a dog? Take him along!!! Try for at least once a week ... maybe two?
Remove any temptations from your home! Are chips tormenting you? Give them away or just don't buy anymore. Cookies .. give them away!
Eat more slowly and focus on what you're eating. Taste your food, enjoy it.
Have a cup of herbal tea after a meal to tell your brain ... "Hey, I'm finished eating!"
Hungry mid-afternoon? Have 10 raw whole almonds. Or 1/2 cup plain Greek yogurt (make your own), or a string cheese! A little goes a long way. Overeating is so easy to do. Stay focused.
I'm old. I'm experienced. I'm healthy. What else do you need to know?