When I feel that I want to cheat, I try to remember the goal that I am working towards and how worth it I really feel the cheat is.
Some people also get set off by eating "high carb" foods, which causes cravings which derails their success.
That doesn't happen to me Luckily, but if I am going to cheat (and I have two times since January) I make it worth it...both times were on special out nights at fancy restaurants and I had Creme Brulee.

Read your body and know what you can and can't have, also, weight out how worth it, it is to you!