I wish I could help, I struggle with it too! I have already quit smoking, so I can't stop eating right now. I have lost weight by just adding more veggies and fruit, cut way back on chips and junk, I still have those things but I am more mindful about it. The best thing in my mind is to pay attention, put forth the effort to eat healthy but realize sometimes you are going to have days you will want the wrong thing.
Also, move more, just walking, I may go to the mall, walk, check out the sales, I mostly don't find anything but I get a lot of walking in. I have always enjoyed diet sodas but I have found I can have a glass of soda when I get up and then switch to ice water. It makes a difference in how I feel and how my clothes fit. I also do not have to get up often when I am sleeping to pee. The doctor told me that drinking soda contributes to that issue. If we just make small changes each day it will make a difference. I think if we do the smart things we will lose weight slowly but it will more than likely be a permanent loss, instead of losing and gaining it back. I know just where you are, it is hard but we can do it, a little at a time.