I gave up coffee because I was having 5 cups a day. My goal was to ultimately cut it down to one after getting used to not having it. Although I agree it's been painful. Never again haha
To answer your question, after a month of not eating bacon for example, I allow myself to have it but I've found I want it less. That was pretty much my goal. I haven't had any fast food since January, but I've had cookies after the 30 days but once every other week as opposed to every day. What has been most valuable has been finding healthier alternatives. I snack less than I did and I eat better instead of crap all the time. It has also been eye opening to see just how much bacon or cookies or whatever I was eating before. Makes you think more when ordering food or shopping.
I've lost 8 pounds this year. I only weighed 180 to start, so nothing major. But it's something.