b.b. Have u thought of trying the Fibre plan tablets, they sell in the health shops? You take 5 with a large glass of water about 1/2 hr before a meal, so that you feel (tummy) full. Then u don't want to eat as much. As already mentioned you benefit from drinking more water. it does help avoid constipation, which is the blight of most diets!
Kelp (tabs) are supposed to help matabilism also. Pop to your local Health shop, as they sometimes have special offers, as you are prob aware, most of their stuff is not cheap!