Hey OP, not to discourage making lifestyle changes or anything but 80 calories isn't all that much. If you can manage to moderate your intake of milk, I think you'll find it much more sustainable to lose weight and keep it off. It's all about finding ways to change your relationship with food in a way that's sustainable to you. If milk in your coffee is something that you enjoy, is there perhaps somewhere else you could cut that 80 calories? Don't give up on all of the small pleasures in your life, sometimes those small things mean more than we realize and it can undermine your efforts to make long term adjustments