What are you eating in the morning? I noticed that when I ate cereal for breakfast I was twice as hungry as I normally was, but when I switched to 2-4 bacon slices, low sodium and relatively low fat, and yogurt then I stopped being so hungry. Although, these aren't the only items. They come to a total of about 250 calories if I have 4 slices, and they're twice as good at filling me up the cereal which is about the same amount. So, that could be half your problem.
Also, I know that I can't snack for more than once a day. I just have to have one snack and cut off right there. My craving is worse in the afternoon, go figure.
As for breakfast, it doesn't necessarily slow down your metabolism, but if you eat during breakfast it actually speeds up your metabolism. It gets your body working and after a period of fasting up to 10 hours you probably should be hungry.
Personally, I am guilty of the cardinal sin due to my... sleeping habits. I have to rush around in the mornings to catch up.
But I noticed that when I ate breakfast I actually was a little more alert and ready to go. Personally, I've never had cereal bars before, so I don't know how good they are for you, but I have to have something warm in my stomach now to get me going.
Anyway, I hope that I've helped you considering how much you've helped me! So, please do your best!