For groceries, really try to meal plan. That really helped me. Even if it’s just a loose plan for the week. Actually go through pantry/freezer/fridge before you shop and see what you have and can use, make a list, and if all else fails, I send my husband with the list bc he doesn’t veer off it . I’m the one who’s like oh look at that on sale, that would be good to have! When we really don’t *need* it.