How can I stop the hunger pains?

I have been working out like crazy. I need to get into primo shape by next year. I am not dieting. I am actually eating one extra meal a day, but my stomach keeps growling. I’ve tried fruits and veggies for snacks but it does nothing. Sometimes I think it even makes me hungrier. My food seems to be disappearing from my stomach in no time. I don’t give in to my hunger because I don’t want to be use to eating that much.

I really don’t like to eat as it is, because its annoying to always figure out what I want to eat. Three meals a day was a chore as it was and I have stretched them out to four because I can’t have a really full stomach or I get sleepy.
I would appreciate any tricks of the trade that will keep me sated.