Its not easy, its a addiction, like anything you have become addicted to, its hard to get off. for me it was sugar and the bread. I had the shakes for a week maybe and felt crap. withdrawal is withdrawal, irrelevant what you were coming off!
But i feel SOOOOOOOOOOO much better for not having sugar and tons of bread everyday. I have the odd sugar in a tea if there is no sweetner to be had, and occasionally have a sandwich, but i mean once in the last 3 months have i had a sandwich for lunch, and i had a BIG bowl of free soup with it.
try to be more imaganative with your breakfasts and lunchs. I have this week been having porridge with fruit and honey on, takes like 2 mins to make.