One of the sugar hurdles I worked for months to overcome was switching from flavored to plain Greek yogurt. In March of 2012, I was at my sister Rachel's house when she served me plain Greek yogurt with frozen fruit and granola. I couldn't do it- it was too sour tasting and not palatable for me. I made it a goal to slowly wean myself off the sweetened yogurt, and I'm proud to say that I have been eating plain for a few months now!
My favorite flavor of yogurt was Chobani Low Fat Pineapple, it has a whopping 18 grams of sugar- no wonder it's so delicious! The nonfat plain yogurt only has 7 grams of sugar. I wanted to share Rachel's yogurt method since it helped me, maybe it can help you make the switch to plain yogurt too.
You'll see when I posted the Easy Granola recipe back in November I was still eating the flavored yogurt. Now, I really enjoy the tangy flavor of the plain. And since I use fruit and a topper with a {tiny} bit of sugar, it is still a satisfying snack for this sweet loving girl.