Maybe you could try eating the foods that tempt you so much for a day or two.. and eat them to your heart's content! Enough hopefully to dull the cravings for them before you start your fast. Then on the night before your fast have a big fruit salad, my best starts to fasts have been after a fruit meal the night before. You fully hydrate yourself and the taste of your last meal almost follows you through the first couple of days.
You could also try putting your water in an esky and staying away from the fridge altogether. :) And going for a walk or something when the cravings hit.
Hope any of this helps.
Take care, and good luck!