When I have a craving for sugar, I make myself some herbal tea (my favs are African Nectar and Chamomile Citrus from Mighty Leaf), and I add erythritol or xylitol to it.
http://en.wikipedia.org/wiki/Erythritol
http://en.wikipedia.org/wiki/Xylitol
Out of the two, I definitely prefer erythritol