It's a dangerous thing to dabble with something that you know you shouldn't have. Generally I find that I pay the price whenever I do. One meal of pizza or rice or whatever, and it will take me another 3-4 days of behaving myself again to get back to where I was.

Your mileage may very of course, but in my experience, it's really not worth it. As Bob says, the old habits will die away as you form new ones. Do I miss some of the old stuff? Sure, but I don't miss what they did to my health.