Hey hun,
Its really only one of two things that go wrong on this diet- 1. your head isn't in the right place (or comes out of it)
2. SSing isn't right for you.
I have found a couple of times that when I have wobbled the only thing that gets me back in the zone is that little voice in my head telling me that 'you don't need this food to survive, it may feel good at the time but straight after you'll feel rubbish, and does it feel as good as it will when you are at target'. Then I realise again why I am doing this, and it is much easier to get back on track. It is about wanting the end result enough to overcome the obstacles.
For some ppl, SSing isn't right for them and they can't psychologically handle the whole not eating thing. If that is you then I suggest you try 790 so you can look forward to food in the evening and don't feel guilty afterwards. I'm on AAM at the moment and find I am much less tempted when I know I will be eating in the evening- its weird!
Anyway, hope you find the strength to get back on track, and talk to yourself out loud about what you are doing and tell yourself why you shouldn't eat that little bit of whatever, before you munch! I'm pretty sure that if you do this you won't touch the food... or at least it works for me!
Good luck hun xx