My friend's dad, Bernie, taught me his trick for having dessert (but not really).
He has one little tiny piece of high quality chocolate every day, in the evening. Just a sliver. He lets it melt slowly on his tongue, instead of chewing it. Bernie says he’s satisfied with just a small taste, eaten ever so slowly.
Sometimes this works really well for me. It satisfies my craving for sweet, and chocolate. And it adds relatively few calories to the day.
On the other hand, if I'm really ravenous for dessert, and lots of it, I don't do it. I don't want to tempt myself to have more than one piece. It's better to not have any at all in those instances, and get my sweet-tooth satisfied from life--by being with my family, or friends, or seeing a good movie, beautiful art, or wonderful music.