Paul McKenna, the hypnotist, has formulated a great eating plan for people who want to change their eating habits. He doesn't call it a diet because it is a plan for life to change your habits, not a temporary plan which you give up after a few months only to put weight on again. He's even helped my mum lose weight and she's battled with it all her life.
His main tenets are:
-Diets are evil and only make you fatter
-When you think you're hungry, drink 2 glasses of water. If you're still hungry afterwards, it means you really are hungry and not just thirsty.
-Eat what you want, when you want.
-Eat when you're hungry, and when you're full, stop. Many people have been brought up in the 'clean plate club' whereby you're told 'there are starving children in Africa, so eat all your food!' There is no shame in leaving some food on your plate.
-Eat 'consciously' - i.e. put your knife and fork down in between each mouthful and don't just wolf your food down, actually chew it and taste it.
He also has some CDs, books and a food diary which you can use if you want to while you adjust, but you don't have to. I find it's making a difference just with doing what I said above, although he has other techniques to suss out whether you're genuinely hungry or just eating with your eyes (such as tapping on acupuncture points, or aversion therapy - visualising your favourite food covered with your least favourite food to make you want it less).
It sounds a bit weird but it really does work if you want to stop overeating