Throw away the diet books.

Seriously.

Buy cookbooks instead.

Go to the library and check out every Moosewood cookbook you can find (especially the later ones which are lighter on the cheese). Also any Alice Waters cookbooks, and any cookbooks from Greens restaurant. Mollie Katzen's "Sunlight Cafe" is another good one.

Pack your own lunches, and only eat lunch out once every couple weeks.

Drink water when you are thirsty. Eat fruit or raw veges (good ol' carrot sticks and pickled olives are handy and easy to pack) when you need a snack.

Cut down on the sweetners and extra salt. (appetite stimulants) If you want a piece of chocolate, have a square of extra dark. Very satisfying and you won't be left craving more.

And get the blood test for celiac disease. (infertility, weight problems, pre-diabetic, endocrine issues