Been yo-yo dieting most of my life. 10 years ago, I lost 4 1/2 stone (with Weightwatchers) just before I got married. Over the years, put that back on. Last year I lost 30 lbs and have put that back on and some more. Right now I don't have the motivation to stick with the 12 weeks diet. I know I need to lose weight for my health and I know that I cannot fit into my clothes. Yet when it comes to eating crisps and sugary snacks, I give in. How can I stay on the wagon?