@AB I did some self hypnosis tapes (from Sharper Image) when I was about 20 and had put on too many lbs. It worked like a charm and I lost too much weight (I think I bottomed out at 148 lbs. (starting at 186). I had to ultimately intentionally gain weight.
I am actually following the basic concept of those tapes right now without the hypnosis and am down 10 lbs this month. It is coming off more slowly, but they are good habits in my opinion and make a difference for the long term. Combine that with the fact that I started before Thanksgiving and am continuing to progress through the holidays and it's even more impressive. It takes a lot of self control, but it doesn't restrict your diet much (during meals).
It's a simple concept, but one we often forget: It is as follows: (1) Make good food decisions (this is basically optional, but it helps; (2) chew your food slowly and drink water between bites; (3) be mindful of whether you feel full and stop eating the instant you begin to feel full. About 10 minutes later, you will feel much more full than when you stopped eating. Put the rest of the food away for later or toss it.
There will be plenty of food for the next meal. So cleaning the plate, as we were often taught, isn't necessary.
The additional instructions are no eating in between meals, sit down to eat, lots of water, if you're at a restaurant and there's bread, eat about half a roll (no butter) or 1 or two chips, and lay off since you won't be able to enjoy the entree if you fill up, and, finally, when it comes to dessert, have some, but limit it to one or two bites.
You enjoy everything, but don't overeat. The first two or three days is hard, but after that, if you let it, it can be routine.
That's it. It works.