Are you actually hungry; is your stomach growling? Or is it emotional hunger? Are you feeling deprived?
I use Splenda for sweetening. Protein and fats will slow down your metabolism as will fiber, vinegar and lemon juice. I use olive oil which is a "good" fat. Try to have a little protein with each meal or snack. Low fat string cheese is a lifesaver. Good old celery stuffed with a little peanut better is also.
I have a recipe for brownies made with beans instead of flour that is, believe it or not, really a treat. Let me know if you'd like to have it.
Cherries are in season right now and have a low glycemic index (
http://www.glycemicindex.com/)
Finally, DIETS SUCK!