I haven't gotten rid of all my old habits, of course, but I definitely have gotten rid of some. I still struggle on my days off to eat healthily (including the weekends).
BUT... When making my lunch, I look for turkey pepperoni, sugar free jello, yogurt, fruit, etc. and NOT for leftovers. When making breakfast, well, I usually gravitate towards egg whites. When shopping, I immediately look for low fat/sugar free/fat free stuff. I look at the old things I liked but I don't even consider buying them.
I think next time I go shopping I will buy a boxed cake mix and try the diet soda + cake mix tricks.