It is great you are so focussed to get back on track. And that you are realistic with your aims. I joined the Xmas thread when it was 21 weeks until Xmas, the sun being 21lbs in 21 weeks. Fab. Really I only want 20.5lbs to bring me to 4.5 stone. This is just 5lbs away now, and last Wednesday we were to write down our Christmas wish. Mine is still 4.5 stone. Because I'm doing well at the moment my consultant suggested aiming for 5 stone. This would leave no wiggle room for the days we go "whoops". I'd rather aim for 4st7lb and get 4st9lb, than aim for 5st and get 4st9lb as I'd feel like I failed, despite the result being the same.
That said I try really hard to stay consistant (jenna knows for a couple of weeks I was consistantly rubbish!) To stop myself over eating post weigh in (and mine is in the morning so that leaves a lot of overeating time) I try to think I have 7 days to lose weight in, or I could over eat today, try to compensate for 3 days which will leave me 3 days to lose what I already have to lose. This can be seen as, I can still claim a loss, or, do I want to maximize my loss this week. It means I feel less pressure but I usually want to maximize it!
Food is tricky. For an alcoholic you have to be dry. For a smoker out with the cigarettes and either nothing or gum/patches etc. But imagine being told you have to smoke, but only certain brands, or, say, menthol light, and you can only have 1 and a half instead of 20 silk cut? There'd be people going crazy. (can you tell I don't smoke, Haha.) But it is along the same lines as losing weight really. You have to eat, it is something you enjoy (mostly) but now you have new rules in place that changes everything you are used to. Sometimes you will get a bit crazy.