I've not read all the responses above but thought I'd just add my story for discussion.
I'm a WWers member, I originally had 2 stone to lose, which I lost due to pointing and exercising. I gave up WWers for a while as thought i'd be able to cope on my own, I was wrong.
When it worked for me it was because I was eating slightly less than the recommended points for my weight/height and training for the Reading Half Marathon. I did that, and my weight plateaued, then I was told I had a wheat intolerance so gave up the wheat and switched to WWers other plan (Core) and carried on with the running. I wasn't running so far at this stage, it was just really frequent and again, the weight dropped off.
Generally, I did Monday to Friday eating well, Friday night I'd have a 'treat' meal and then was back to it at the weekend.
It worked for me but I was sensible how I did things. I've become very aware of what's good and bad but still track each day to make sure I don't pile on any more pounds. I now need to try and lose my final stone (again) and then try and stick at the weight I prefer.
I hope you find something that works for you. I know how hard it is but if you're mentally ready for it you'll do anything.