Very good advice there from Kathy ! As she says, try to break the routine, so after dinner, do something else instead of either having (or thinking about having) a fag... Do the washing up, go brush your teeth, have a glass of chilled water, go for a walk and admire the stars, ring a mate, etc etc, just do something other than what you normally do.
Also, if you find that you really miss say the fag with the morning cup of coffee, then have a cup of tea or a piece of fruit instead.... break the routine, break the habit !
Speaking from personal experience here, I found having a glass of chilled water and brushing my teeth enough of a distraction (for just the few minutes that the cravings last) to get me through the next few hours.... so take it just one day at a time.