By no means am I promoting junkfoodaholism but have you tried low-cal snacks? Those little 100 calorie snacks? And I'm sure you can find some good junkfood at your local healthfood store. That way you won't go cold turkey and break out the hen house straight to the sugar cane fields.
Your cravings may subside but not necessarily go completely away...mine haven't. I drink a cup of coffee w/ vanilla creamer w/ a tsp. of sugar and plenty of fruit. That helps me a lot with my sugar craving. And when I crave salt I eat Nutrisystem Soy Cheddar & BBQ chips or nuts.