Get out of the car. 
The car is the place of anonymous caloric offenses. 
If I get out of the car at the coffee place, I avoid the 15 cars waiting. I walk a few extra steps for the day. I carry my cup in. I get a plain coffee - I've gone to that, as my tolerance for carbs disappears like grains of sand in the wind. I actually interact with people - hard, but necessary. I put cinnamon in my coffee, which is good for my diabetic self.  I walk back to my car. 
If I sit in my car, I can change my mind. I can order something I shouldn't. No one will see me with the high calorie frothy drink, and maybe a pastry. 
Get out of the car. 
I've cut fast food out of my life. I won't get out of my car because I don't want to admit that I am going to eat that. But in my car...I can "impulsively" pull in for that craving for whatever forbidden food I am allowing to comfort me. In my car I can eat anonymously. 
It's such a small step.  
It can make a huge difference...literally!
e b e r