I found that brushing your teeth or taking an antacid makes the munchies go away for a while. Or chewing a piece of gum works too.

You can't ignore your munchies forever, so eat healthier less fattening food ie: apples, oranges, carrots w/ mustard(YUM), celery, salads w/ oil, vinegar and salt as dressing.

Or just say fuck it, eat what you want and work out afterwards. If you're not motivated enough to go to the gym or whatever, then, well, lots and lots and LOTS of caffeine works too. Get NoDoze and chow those down. Just don't take more than like 4 of those a day as caffeine's LD50 dose for an average person is about 2000 mg's. I mean you could take like 10 of those NoDoz's but I wouldn't recommnd it.