I've lost very well in the past with intuitive eating but once I got pretty near goal, I'd got so used to just eating what I want that I lost concentration and my portion sizes got ridiculous.
I'm currently following the Dukan low carb diet but I'm really struggling with it cost-wise. It's a low fat version of low carbing which suits me really well - although I can eat fat fine when I'm eating carbs, without the carbs fat has a really bad effect on me - think Xenical!

I also watch portion size, and do intuitive eating, more or less listening to my body. If I no longer feel hungry and I feel satisfied I stop eating. If I'm hungry and I didn't eat too long ago I drink water. If I'm still hungry I choose something healthy to snack on.