No one said that this would be easy, however it does get different. A craving only last for 7 seconds it is what we do after that 7 seconds that makes it go on longer. Try to get up from whatever you are doing and do something different, read, write, watch a movie, just change your thoughts might be a good thing to say the Serenity Prayer.
God
grant me the serenity
to accept the things that I can not change
Courage to change the things that I can
and the wisdom to know the difference
Keep saying that over and over and concentrate on the words and what they mean to you.
Love Vic